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https://github.com/RangeNetworks/openbts.git
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cafe8d5805
For network based devices (USRP2, N200, etc.), increase the latency from 2 to 3 frames, which effectively buffers more samples on the host in front of the Ethernet interface. USB devices (USRP1 and B100) utilize an adaptive mechanism so they are less effected by this value. Signed-off-by: Thomas Tsou <ttsou@vt.edu> git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2685 19bc5d8c-e614-43d4-8b26-e1612bc8e597
130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
/*
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* Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
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* Copyright 2010 Kestrel Signal Processing, Inc.
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*
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* This software is distributed under the terms of the GNU Affero Public License.
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* See the COPYING file in the main directory for details.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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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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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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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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*/
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#include "Transceiver.h"
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#include "radioDevice.h"
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#include "DummyLoad.h"
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#include <time.h>
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#include <signal.h>
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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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#ifdef RESAMPLE
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#define DEVICERATE 400e3
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#else
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#define DEVICERATE 1625e3/6
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#endif
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using namespace std;
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ConfigurationTable gConfig("/etc/OpenBTS/OpenBTS.db");
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volatile bool gbShutdown = false;
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static void ctrlCHandler(int signo)
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{
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cout << "Received shutdown signal" << endl;;
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gbShutdown = true;
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}
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int main(int argc, char *argv[])
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{
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if ( signal( SIGINT, ctrlCHandler ) == SIG_ERR )
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{
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cerr << "Couldn't install signal handler for SIGINT" << endl;
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exit(1);
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}
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if ( signal( SIGTERM, ctrlCHandler ) == SIG_ERR )
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{
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cerr << "Couldn't install signal handler for SIGTERM" << endl;
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exit(1);
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}
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// Configure logger.
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gLogInit("transceiver",gConfig.getStr("Log.Level").c_str(),LOG_LOCAL7);
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int numARFCN=1;
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LOG(NOTICE) << "starting transceiver with " << numARFCN << " ARFCNs (argc=" << argc << ")";
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srandom(time(NULL));
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int mOversamplingRate = numARFCN/2 + numARFCN;
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RadioDevice *usrp = RadioDevice::make(DEVICERATE);
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if (!usrp->open()) {
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return EXIT_FAILURE;
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}
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RadioInterface* radio = new RadioInterface(usrp,3,SAMPSPERSYM,mOversamplingRate,false);
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Transceiver *trx = new Transceiver(5700,"127.0.0.1",SAMPSPERSYM,GSM::Time(3,0),radio);
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trx->receiveFIFO(radio->receiveFIFO());
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/*
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signalVector *gsmPulse = generateGSMPulse(2,1);
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BitVector normalBurstSeg = "0000101010100111110010101010010110101110011000111001101010000";
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BitVector normalBurst(BitVector(normalBurstSeg,gTrainingSequence[0]),normalBurstSeg);
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signalVector *modBurst = modulateBurst(normalBurst,*gsmPulse,8,1);
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signalVector *modBurst9 = modulateBurst(normalBurst,*gsmPulse,9,1);
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signalVector *interpolationFilter = createLPF(0.6/mOversamplingRate,6*mOversamplingRate,1);
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signalVector totalBurst1(*modBurst,*modBurst9);
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signalVector totalBurst2(*modBurst,*modBurst);
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signalVector totalBurst(totalBurst1,totalBurst2);
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scaleVector(totalBurst,usrp->fullScaleInputValue());
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double beaconFreq = -1.0*(numARFCN-1)*200e3;
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signalVector finalVec(625*mOversamplingRate);
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for (int j = 0; j < numARFCN; j++) {
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signalVector *frequencyShifter = new signalVector(625*mOversamplingRate);
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frequencyShifter->fill(1.0);
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frequencyShift(frequencyShifter,frequencyShifter,2.0*M_PI*(beaconFreq+j*400e3)/(1625.0e3/6.0*mOversamplingRate));
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signalVector *interpVec = polyphaseResampleVector(totalBurst,mOversamplingRate,1,interpolationFilter);
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multVector(*interpVec,*frequencyShifter);
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addVector(finalVec,*interpVec);
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}
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signalVector::iterator itr = finalVec.begin();
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short finalVecShort[2*finalVec.size()];
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short *shortItr = finalVecShort;
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while (itr < finalVec.end()) {
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*shortItr++ = (short) (itr->real());
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*shortItr++ = (short) (itr->imag());
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itr++;
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}
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usrp->loadBurst(finalVecShort,finalVec.size());
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*/
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trx->start();
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//int i = 0;
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while(!gbShutdown) { sleep(1); }//i++; if (i==60) break;}
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cout << "Shutting down transceiver..." << endl;
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// trx->stop();
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delete trx;
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// delete radio;
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}
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