Transceiver52M: Add device offset correction table

Previously, two timing correction values were used for UHD devices
depending on the sample rate of 270.833e3 or 400e3 for native GSM or
resampled device rate respectively. The correction values compensate
for residual timing effects due to analog component delays, filters
lag times, and general fudge factors. These values are device
specific and over-generalized by the two value configuration.

This patch adds the following struct to store these correction
values by device type and sample rate - through samples-per-symbol.

struct uhd_dev_offset {
        enum uhd_dev_type type;
        int sps;
        double offset;
};

Signed-off-by: Thomas Tsou <tom@tsou.cc>

git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@6720 19bc5d8c-e614-43d4-8b26-e1612bc8e597

Transceiver52M/USRPping.cpp

@@ -41,7 +41,7 @@ int main(int argc, char *argv[]) {
   else gLogInit("DEBUG");
   //if (argc>2) gSetLogFile(argv[2]);
 
-  RadioDevice *usrp = RadioDevice::make(52.0e6/192.0);
+  RadioDevice *usrp = RadioDevice::make(52.0e6/192.0, 1);
 
   usrp->open("");