mirror of
https://gitea.osmocom.org/cellular-infrastructure/osmo-trx.git
synced 2025-11-03 21:53:18 +00:00
b79895c999
* Adds 4 and 1 pulse Laurent GMSK modulators
* Adds NCO based modulator
* Adds synchronization and frequency burst generators
* Adds GPIO frame trigger on GPIO-0
* Tested on USRP B210 only
* Requires C++14 support
B210 GPIO Pin Map
J504
---------
fp_gpio<0> | 1 | 2 | fp_gpio<1>
---------
fp_gpio<2> | 3 | 4 | fp_gpio<3>
---------
fp_gpio<4> | 5 | 6 | fp_gpio<5>
---------
fp_gpio<6> | 7 | 8 | fp_gpio<7>
---------
gnd | 9 | 10| gnd
---------
Change-Id: I891725d7f0cfa97c79e64f978a60dc11a206195c
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
491 lines
14 KiB
C++
491 lines
14 KiB
C++
/*
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* GSM Signal Generator
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*
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* Copyright (C) 2017 Ettus Research LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* See the COPYING file in the main directory for details.
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*
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* Author: Tom Tsou <tom.tsou@ettus.com>
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*/
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#include <limits.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <algorithm>
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#include <functional>
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#include <memory>
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#include <map>
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#include <GSMCommon.h>
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#include <Logger.h>
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#include <Configuration.h>
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#include <GSMCommon.h>
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#include "sigProcLib.h"
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#include "radioDevice.h"
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extern "C" {
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#include "convolve.h"
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#include "convert.h"
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}
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ConfigurationTable gConfig;
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#define DEFAULT_TX_SPS 4
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#define DEFAULT_TX_AMPL 0.5
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#define DEFAULT_TX_GAIN 50
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#define DEFAULT_TX_FREQ 1e9
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#define DEFAULT_OFFSET 0.0
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using namespace std;
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enum GsmModType {
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MOD_LAURENT4,
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MOD_LAURENT2,
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MOD_LAURENT1,
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MOD_NCO,
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NUM_MODS,
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};
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enum BurstType {
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BURST_NORMAL,
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BURST_ACCESS,
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BURST_FREQ,
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BURST_SYNC,
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BURST_EDGE,
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NUM_BURSTS,
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};
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enum BurstTSC {
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TSC0, TSC1, TSC2, TSC3, TSC4, TSC5, TSC6, TSC7,
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};
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struct Config {
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string args = "";
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string logl = "NOTICE";
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unsigned sps = DEFAULT_TX_SPS;
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double offset = DEFAULT_OFFSET;
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bool swap = false;
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float ampl = DEFAULT_TX_AMPL;
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double freq = DEFAULT_TX_FREQ;
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double gain = DEFAULT_TX_GAIN;
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BurstTSC tsc = TSC0;
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GsmModType mod = MOD_LAURENT2;
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BurstType burst = BURST_NORMAL;
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RadioDevice::ReferenceType ref = RadioDevice::REF_INTERNAL;
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};
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static shared_ptr<signalVector> modulateGMSK(BitVector &bits, GsmModType modType)
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{
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switch (modType) {
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case MOD_LAURENT4: return shared_ptr<signalVector>(modulateBurstLaurent4(bits));
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case MOD_LAURENT2: return shared_ptr<signalVector>(modulateBurstLaurent2(bits));
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case MOD_LAURENT1: return shared_ptr<signalVector>(modulateBurstLaurent1(bits));
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case MOD_NCO: return shared_ptr<signalVector>(modulateBurstNCO(bits));
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default: return shared_ptr<signalVector>(modulateBurstLaurent2(bits));
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};
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}
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static shared_ptr<signalVector> generateNormalBurst(BurstTSC tsc, GsmModType modType)
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{
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auto tail = vector<char>(3, 0);
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auto data0 = vector<char>(57);
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auto data1 = vector<char>(57);
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auto steal = vector<char>(1, 0);
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auto train = vector<char>(26);
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auto ti = begin(GSM::gTrainingSequence[tsc]);
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for (auto &t : train) t = *ti++;
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for (auto &d : data0) d = rand() % 2;
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for (auto &d : data1) d = rand() % 2;
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auto bits = BitVector(NORMAL_BURST_NBITS);
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auto bi = bits.begin();
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for (auto t : tail) *bi++ = t;
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for (auto d : data0) *bi++ = d;
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for (auto s : steal) *bi++ = s;
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for (auto t : train) *bi++ = t;
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for (auto s : steal) *bi++ = s;
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for (auto d : data1) *bi++ = d;
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for (auto t : tail) *bi++ = t;
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return modulateGMSK(bits, modType);
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}
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static shared_ptr<signalVector> generateRABurst(GsmModType modType)
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{
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auto tail0 = vector<char>(8, 0);
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auto train = vector<char>(41);
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auto data = vector<char>(36);
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auto tail1 = vector<char>(3, 0);
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auto ti = begin(GSM::gRACHBurst);
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for (auto &t : train) t = *ti++;
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for (auto &d : data) d = rand() % 2;
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auto bits = BitVector(88);
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auto bi = bits.begin();
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for (auto t : tail0) *bi++ = t;
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for (auto t : train) *bi++ = t;
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for (auto d : data) *bi++ = d;
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for (auto t : tail1) *bi++ = t;
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return modulateGMSK(bits, modType);
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}
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static shared_ptr<signalVector> generateFreqBurst(GsmModType modType)
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{
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auto tail = vector<char>(3, 0);
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auto fixed = vector<char>(142);
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auto bits = BitVector(148);
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auto bi = bits.begin();
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for (auto t : tail) *bi++ = t;
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for (auto f : fixed) *bi++ = f;
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for (auto t : tail) *bi++ = t;
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return modulateGMSK(bits, modType);
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}
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static shared_ptr<signalVector> generateSyncBurst(GsmModType modType)
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{
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auto tail = vector<char>(3, 0);
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auto data0 = vector<char>(39);
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auto data1 = vector<char>(39);
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/* 64 length synchronization sequence */
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vector<char> train {
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1, 0, 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0,
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0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
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0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1,
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0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1,
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};
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for (auto &d : data0) d = rand() % 2;
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for (auto &d : data1) d = rand() % 2;
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auto bits = BitVector(148);
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auto bi = bits.begin();
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for (auto t : tail) *bi++ = t;
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for (auto d : data0) *bi++ = d;
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for (auto t : train) *bi++ = t;
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for (auto d : data1) *bi++ = d;
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for (auto t : tail) *bi++ = t;
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return modulateGMSK(bits, modType);
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}
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static shared_ptr<signalVector> generateEDGEBurst(BurstTSC tsc)
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{
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auto tail = vector<Complex<float>>(3);
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auto data0 = vector<Complex<float>>(58);
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auto train = vector<Complex<float>>(26);
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auto data1 = vector<Complex<float>>(58);
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extern const Complex<float> psk8_table[8];
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for (auto &t : tail) t = psk8_table[0b111];
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for (auto &d : data0) d = psk8_table[rand() % 8];
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for (auto &d : data1) d = psk8_table[rand() % 8];
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auto ti = begin(GSM::gEdgeTrainingSequence[tsc]);
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for (auto &t : train) {
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unsigned i = (*(ti + 0) & 0b001) << 0 |
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(*(ti + 1) & 0b001) << 1 |
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(*(ti + 2) & 0b001) << 2;
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t = psk8_table[i];
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ti += 3;
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}
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/* NBITS refers to 148 symbols in this case */
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auto burst = signalVector(NORMAL_BURST_NBITS);
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auto bi = burst.begin();
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for (auto t : tail) *bi++ = t;
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for (auto d : data0) *bi++ = d;
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for (auto t : train) *bi++ = t;
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for (auto d : data1) *bi++ = d;
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for (auto t : tail) *bi++ = t;
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return shared_ptr<signalVector>(shapeEdgeBurst(burst));
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}
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/* Perform float-integer conversion and write to the device */
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static void sendBurst(shared_ptr<RadioDevice> usrp, TIMESTAMP &ts,
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shared_ptr<signalVector> sv, float ampl)
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{
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auto buffer = vector<Complex<short>>(sv->size());
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transform(sv->begin(), sv->end(), buffer.begin(), [ampl](Complex<float> x) {
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const float scale = SHRT_MAX * ampl;
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return Complex<short>(x.real()*scale, x.imag()*scale);
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});
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auto buffers = vector<short *>(1, reinterpret_cast<short *>(&buffer.front()));
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ts += usrp->writeSamples(buffers, buffer.size(), nullptr, ts, true);
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}
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static void print_help()
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{
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fprintf(stdout, "Options:\n"
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" -h, --help This text\n"
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" -a, --args UHD device args\n"
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" -l --log Logging level (%s)\n"
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" -b, --burst Burst type (%s)\n"
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" -r, --ref Frequency reference (%s)\n"
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" -f, --freq Tx RF frequency\n"
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" -g, --gain Tx RF gain\n"
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" -s, --sps Tx samples-per-symbol (only 4 supported)\n"
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" -m, --mod GSMK modulator type (%s)\n"
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" -p, --ampl Tx amplitude (0.0 - 1.0)\n"
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" -o, --offset Baseband frequency offset\n"
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" -t, --tsc Normal and EDGE burst training sequence (0-7)\n"
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" -S, --swap Swap channels\n\n",
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"'err', 'warn', 'notice', 'info', 'debug'",
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"'normal', 'access', 'freq', 'sync', 'edge'",
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"'internal', 'external', 'gps'",
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"'laurent4', 'laurent2', 'laurent1', 'nco'"
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);
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}
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static void print_config(Config &config)
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{
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const map<GsmModType, string> modMap = {
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{ MOD_LAURENT4, "Laurent-4" },
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{ MOD_LAURENT2, "Laurent-2" },
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{ MOD_LAURENT1, "Laurent-1" },
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{ MOD_NCO, "NCO" },
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};
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const map<BurstType, string> burstMap = {
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{ BURST_NORMAL, "Normal" },
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{ BURST_ACCESS, "Access" },
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{ BURST_FREQ, "Frequency" },
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{ BURST_SYNC, "Synchronization" },
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{ BURST_EDGE, "EDGE" },
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};
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const map<RadioDevice::ReferenceType, string> refMap = {
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{ RadioDevice::REF_INTERNAL, "Internal" },
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{ RadioDevice::REF_EXTERNAL, "External" },
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{ RadioDevice::REF_GPS, "GPS" },
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};
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auto yesno = [](bool x) { return x ? "yes" : "no"; };
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ostringstream ost("");
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ost << "Config Settings" << endl;
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ost << " Log level............... " << config.logl << std::endl;
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ost << " Device args............. " << "\"" << config.args << "\"" << endl;
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ost << " Samples-per-Symbol...... " << config.sps << endl;
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ost << " RF frequency............ " << config.freq/1e9 << " GHz" << endl;
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ost << " RF gain................. " << config.gain << " dB" << endl;
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ost << " Reference............... " << refMap.at(config.ref) << endl;
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ost << " Burst type.............. " << burstMap.at(config.burst) << endl;
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ost << " Modulator type.......... " << modMap.at(config.mod) << endl;
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ost << " Baseband offset......... " << config.offset/1e6 << " MHz" << endl;
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ost << " Swap channels........... " << yesno(config.swap) << endl;
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cout << ost << endl;
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}
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static bool handle_options(int argc, char **argv, Config &config)
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{
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int option;
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const struct option longopts[] = {
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{ "help", 0, nullptr, 'h' },
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{ "log", 1, nullptr, 'l' },
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{ "args", 1, nullptr, 'a' },
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{ "ref" , 1, nullptr, 'r' },
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{ "freq", 1, nullptr, 'f' },
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{ "gain", 1, nullptr, 'g' },
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{ "mod", 1, nullptr, 'm' },
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{ "offset", 1, nullptr, 'o' },
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{ "sps", 1, nullptr, 's' },
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{ "ampl", 1, nullptr, 'p' },
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{ "tsc", 1, nullptr, 'r' },
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{ "burst", 1, nullptr, 'b' },
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{ "swap", 1, nullptr, 'w' },
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};
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const map<string, string> logMap = {
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{ "emerg", "EMERG" },
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{ "EMERG", "EMERG" },
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{ "alert", "ALERT" },
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{ "ALERT", "ALERT" },
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{ "err", "ERR" },
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{ "ERR", "ERR" },
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{ "warn", "WARNING" },
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{ "WARN", "WARNING" },
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{ "notice", "NOTICE" },
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{ "NOTICE", "NOTICE" },
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{ "info", "INFO" },
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{ "INFO", "INFO" },
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{ "debug", "DEBUG" },
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{ "DEBUG", "DEBUG" },
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};
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const map<string, GsmModType> modMap = {
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{ "laurent4", MOD_LAURENT4 },
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{ "laurent2", MOD_LAURENT2 },
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{ "laurent1", MOD_LAURENT1 },
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{ "nco", MOD_NCO },
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};
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const map<string, BurstType> burstMap = {
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{ "normal", BURST_NORMAL },
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{ "access", BURST_ACCESS },
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{ "freq", BURST_FREQ },
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{ "sync", BURST_SYNC },
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{ "edge", BURST_EDGE },
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};
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const map<string, RadioDevice::ReferenceType> refMap = {
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{ "internal", RadioDevice::REF_INTERNAL },
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{ "external", RadioDevice::REF_EXTERNAL },
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{ "gpsdo", RadioDevice::REF_GPS },
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{ "gps", RadioDevice::REF_GPS },
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};
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while ((option = getopt_long(argc, argv, "ha:l:r:f:g:m:o:s:p:t:b:w", longopts, nullptr)) != -1) {
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switch (option) {
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case 'a':
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config.args = optarg;
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break;
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case 'f':
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config.freq = atof(optarg);
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break;
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case 'g':
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config.gain = atof(optarg);
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break;
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case 'o':
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config.offset = atof(optarg);
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break;
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case 's':
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if (atoi(optarg) != 4) {
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printf("Unsupported SPS = %i\n", atoi(optarg));
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return false;
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}
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break;
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case 'p':
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config.ampl = atof(optarg);
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break;
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case 't':
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if (atoi(optarg) < TSC0 || atoi(optarg) > TSC7) {
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printf("Invalid training sequence %i", atoi(optarg));
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return false;
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}
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config.tsc = static_cast<BurstTSC>(atoi(optarg));
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break;
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case 'w':
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config.swap = true;
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break;
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case 'l':
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if (logMap.count(optarg) > 0) {
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config.logl = logMap.at(optarg);
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} else {
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printf("Invalid log parameter '%s'\n\n", optarg);
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return false;
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}
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break;
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case 'r':
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if (refMap.count(optarg) > 0) {
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config.ref = refMap.at(optarg);
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} else {
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printf("Invalid reference parameter '%s'\n\n", optarg);
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return false;
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}
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break;
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case 'm':
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if (modMap.count(optarg) > 0) {
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config.mod = modMap.at(optarg);
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} else {
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printf("Invalid modulation parameter '%s'\n\n", optarg);
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return false;
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}
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break;
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case 'b':
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if (burstMap.count(optarg) > 0) {
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config.burst = burstMap.at(optarg);
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} else {
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printf("Invalid burst type parameter '%s'\n\n", optarg);
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return false;
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}
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break;
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case 'h':
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default:
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return false;
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}
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}
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return true;
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}
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int main(int argc, char **argv)
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{
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Config config;
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if (!handle_options(argc, argv, config)) {
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print_help();
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return -EINVAL;
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}
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print_config(config);
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gLogInit("osmo-siggen", config.logl.c_str(), LOG_LOCAL7);
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convolve_init();
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convert_init();
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sigProcLibSetup();
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/* Device setup */
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shared_ptr<RadioDevice> usrp(RadioDevice::make(config.sps, config.sps, RadioDevice::NORMAL, 1, config.offset));
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usrp->open(config.args, config.ref, config.swap);
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usrp->setTxFreq(config.freq);
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usrp->setTxGain(config.gain);
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usrp->start(true);
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usrp->setPriority(0.5);
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/* Bind all burst-modulator configurations */
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auto makeBurstGenerator = [&config]()->function<shared_ptr<signalVector>()> {
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switch (config.burst) {
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case BURST_EDGE: return bind(generateEDGEBurst, config.tsc);
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case BURST_ACCESS: return bind(generateRABurst, config.mod);
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case BURST_FREQ: return bind(generateFreqBurst, config.mod);
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case BURST_SYNC: return bind(generateSyncBurst, config.mod);
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case BURST_NORMAL:
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default: return bind(generateNormalBurst, config.tsc, config.mod);
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}
|
|
};
|
|
|
|
auto burstGenerator = makeBurstGenerator();
|
|
auto ts = usrp->initialWriteTimestamp();
|
|
auto frameTrigger = []() {
|
|
static int tn = 0;
|
|
return ++tn % 8 == 0;
|
|
};
|
|
|
|
while (1) {
|
|
try {
|
|
if (frameTrigger()) usrp->triggerGPIO(ts);
|
|
sendBurst(usrp, ts, burstGenerator(), config.ampl);
|
|
} catch (const exception &e) {
|
|
cout << e.what() << endl;
|
|
break;
|
|
}
|
|
}
|
|
|
|
sigProcLibDestroy();
|
|
}
|