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| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2017-05-12 11:25:39 +0200 |
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| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2017-05-12 11:25:39 +0200 |
| commit | eefe0ff989243b5af65fc6af0448fa4578fc713e (patch) | |
| tree | f095be8e9a2c66158846ec8ef2bb41984f6269b8 | |
| parent | a656cee6c9c230bb921c6bb6be0f0180460a96b4 (diff) | |
| download | dabmod-eefe0ff989243b5af65fc6af0448fa4578fc713e.tar.gz dabmod-eefe0ff989243b5af65fc6af0448fa4578fc713e.tar.bz2 dabmod-eefe0ff989243b5af65fc6af0448fa4578fc713e.zip | |
Update DPD readme and add example
| -rw-r--r-- | dpd/README.md | 8 | ||||
| -rw-r--r-- | dpd/dpd.ini | 41 |
2 files changed, 49 insertions, 0 deletions
diff --git a/dpd/README.md b/dpd/README.md index 828a483..96c4fb0 100644 --- a/dpd/README.md +++ b/dpd/README.md @@ -8,3 +8,11 @@ This folder contains work in progress for digital predistortion. It requires: - A feedback connection from the power amplifier output, at an appropriate power level for the B200. Usually this is done with a directional coupler. - ODR-DabMod with enabled dpd_port, and with a samplerate of 8192000 samples per second. +- Synchronous=1 so that the USRP has the timestamping set properly. + +See dpd/dpd.ini for an example. + +TODO +---- + +Fix timestamps and test if frame data is valid. diff --git a/dpd/dpd.ini b/dpd/dpd.ini new file mode 100644 index 0000000..906827b --- /dev/null +++ b/dpd/dpd.ini @@ -0,0 +1,41 @@ +[remotecontrol] +telnet=1 +telnetport=2121 + +[log] +syslog=0 +filelog=0 +filename=/dev/stderr + +[input] +transport=tcp +source=localhost:9200 + +[modulator] +digital_gain=0.9 +rate=8192000 + +[firfilter] +enabled=0 + +[output] +output=uhd + +[uhdoutput] +device= +master_clock_rate=32768000 +type=b200 +txgain=50 +channel=13C +refclk_source=internal +pps_source=none +behaviour_refclk_lock_lost=ignore +max_gps_holdover_time=600 +dpd_port=50055 + +[delaymanagement] +; Use synchronous=1 so that the USRP time is set. This works +; even in the absence of a reference clk and PPS +synchronous=1 +mutenotimestamps=1 +offset=4.0 |