This file contains information about the changes done to
ODR-DabMod in this repository

2025-02-26: Matthias P. Braendli <matthias@mpb.li>
	(v3.0.0):
		Add support for the PrecisionWave DEXTER Modulator.
		Improve timestamp decoding and handling.
		Fix TII carrier levels.
		Add `showjson` command to RC to support structured output,
		and add useful metrics to the RC for monitoring, e.g. some Ensemble information from FIC.
		Remove EasyDABv3 support.
		Remove ZeroMQ input.
		Require C++17.
		v2.7.0 retracted.

2022-04-20: Matthias P. Braendli <matthias@mpb.li>
	(v2.6.0):
		Add timestamps to log output.

2022-02-02: Matthias P. Braendli <matthias@mpb.li>
	(v2.5.0):
		Add support for BladeRF devices.
		Improve EDI input.
		Improve compilation on arm devices.
		Avoid stalling the input when FFTW planner takes too much time.

2021-02-22: Matthias P. Braendli <matthias@mpb.li>
	(v2.4.2):
		Fix some compilation issues for GCC 10 and due to missing includes.
		Fix external PPS input sync for B200.
		Properly handle and edge value of TIST.
		Update common ODR-mmbTools code.

2020-04-06: Matthias P. Braendli <matthias@mpb.li>
	(v2.4.1):
		Fix handling of Ctrl-C.
		Fix unaligned memory access in ZeroMQ input.
		Fix incorrect display of "EDI AF Packet sequence error".

2020-03-16: Matthias P. Braendli <matthias@mpb.li>
	(v2.4.0):
		Put more code in common with the other ODR-mmbTools.
		Rework EDI input, which is now always compiled-in and preferred
		to ZMQ input (for standards compliance).
		Add native Lime support.

2019-07-08: Matthias P. Braendli <matthias@mpb.li>
	(v2.3.1):
		Add analog bandwidth setting for UHD and SoapySDR outputs.
		Implement 10s check for ZMQ input, resetting the socket if no
		data arrives.
		Fix compilation against UHD 3.14.
		Add EDI-over-TCP input.
		Other minor fixes for GUI and ODR-DabMod.

2019-01-23: Matthias P. Braendli <matthias@mpb.li>
	(v2.3.0):
		Many improvements on GUI and DPDCE: It is now possible
		to control the predistortion entirely through the web GUI.
		See `python/README.md` for more.
		Add SDR temperature to RC and munin.
		Fix I/Q s16 output format.
		SoapySDR output: do not set master clock rate if it is 0.
		Fix warning about feedback server.
		Fix digital gain being forgotten after an input stream interruption.
		Handle negative tist offset settings.

2018-08-07: Matthias P. Braendli <matthias@mpb.li>
	(v2.2.0):
		Fix bug in CFR implementation that was introduced in v2.1.0.
		Make the ZeroMQ list command return JSON.
		Add a few GPSDO stats to munin.
		Make sure changes applied through RC stay after an internal modulator reset.
		Remove the boost dependency.

2018-05-29: Matthias P. Braendli <matthias@mpb.li>
	(v2.1.0):
		Add s16 output format.
		Add compilation target for the EasyDABv3, which
		doesn't have boost and requires constellation points
		output. This required changing the configuration file parser.
		Avoid RC crash when setting invalid values.

2018-03-21: Matthias P. Braendli <matthias@mpb.li>
	(v2.0.0):
		Big rework of the SDR device handling, putting in common more
		logic between UHD and SoapySDR. Goal is to enable SoapySDR devices
		to be used for SFN and for DPD. (Not yet possible)
		Replace the old timestamp path that went around the process flowgraph
		by a new metadata path that goes through the flowgraph, to avoid the
		issues with misalignment of frame and timestamps. Do not mix different
		versions when using timestamps, and be careful when mixing ODR-DabMod
		with other transmitters in SFNs, as the timestamp interpretation can
		change!
		Fix TII carrier selection.
		Add OFDM symbol windowing for improved shoulder performance.
		Add a timeout to the ZeroMQ input to quit on SIGINT (Ctrl-C).
		Optionally show the flowgraph metadata in the file output for
		test purposes.
		Add antenna selection to UHD and SoapySDR outputs.
		Make EDI input optional (it's not well tested, unfinished and slows
		compile time)
		Improve portability for non-Linux POSIX systems.
		Default to TM 1, do not read from ETI anymore.
		Add support for UHD 3.11.
		Implement auto-reconnect for the TCP input.

2017-11-18: Matthias P. Braendli <matthias@mpb.li>
	(v1.1.0):
		Fix TII insertion power level.
		Fix bug in parsing timestamps appearing in rare conditions.
		Add Crest Factor Reduction prototype.
		Cleanup console output of flowgraph statistics.
		Add prototype for Digital Predistortion.
		Enable some additional compiler warnings.
		Add some useful UHD statistics to RC.
		Add configure option to disable march=native.

2017-06-05: Matthias P. Braendli <matthias@mpb.li>
	(v1.0.1):
		Move GainControl into a separate thread to make better use
		of multiprocessor systems.
		Give explicit names to GainControl modes (fix, max, var) in
		configuration.
		Add u8 IQ output format.
		Add a normalised complexf IQ output format.
		Make resampler unity-gain, i.e. remove digital_gain - sample rate
		dependency.
		Read UHD async messages in separate thread to lessen influence on the
		time-critical transmit thread.
		Pre-fill UHD IQ buffer before starting to stream data, to ensure it is
		properly filled and reduce underruns.

2017-03-03: Matthias P. Braendli <matthias@mpb.li>
	(v1.0.0):
	* odr-dabmod:
		Add ETI-over-TCP input.
		Add EDI input.
		Add SoapySDR output, than can drive HackRF, LimeSDR and other boards.
		Add LO offset to UHD output.
		Make gainmode VAR the default and improve config syntax.
		Fix TII insertion.
		Display FCT and TIST in remote control.
		Add most commonly used FIRFilter taps into binary and enable the
		filter by default.
		Add fast math configure option that can be used to improve performance
		on ARM platforms as it allows the compiler to use NEON.
		Improve logging.
		Refactor internals (flowgraph, main loop, C++11 modernisation and more)

2016-07-30: Matthias P. Braendli <matthias@mpb.li>
	(v0.6.0):
	* odr-dabmod:
		Remove the broken KISS FFT support.
		Replace FCT discontinuity check by verification of
		the timestamps.
		Change DSP thread priorities to realtime.
		Quite some internal refactoring.
		Fix segfault on quit due to incorrect teardown of FFTW.
		Add Travis CI build instructions.

2015-11-27: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.5):
	* odr-dabmod:
		Fix compile errors with recent C++ standard library.
		Correct command line options when using UHD and ZMQ input.
		Enable ZeroMQ be default in ./configure

2015-09-18: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.4)
	* odr-dabmod:
		Better GPSDO handling, both for Ettus GPSDO
		and ODR LEA-M8F board.
		Add (experimental) TII support.
		Improve thread priority definition.
		Simplify handling of TIST offset, and add to RC.
		Switch project to C++11.

2015-07-24: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.3)
	* odr-dabmod:
		Replace zmq.hpp to support version 4.1.x

2015-04-10: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.2)
	* odr-dabmod:
		Merge static delay parameter and ZeroMQ remote control.
		Add max_frames_queued option for ZeroMQ input.
		Restart modulator on FCT discontinuity or ZeroMQ input
		buffer overrun.
		Improve error messages and documentation.
		Add ZeroMQ output REP socket type for interconnection with
		GNURadio.
		Fix license text in usage view.

2015-01-24: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.1)
	* odr-dabmod:
		Security: force Telnet RC to listen only on
		localhost.
		Add raspine's ZeroMQ RC and UHD staticdelay setting
		Add I/Q format converter (signed 8-bit)

2014-12-09: Matthias P. Braendli <matthias@mpb.li>
	(v0.5.0)
	* odr-dabmod:
		Add support for ARM processors.
		Use FFTW instead of KISS FFT by default.
		Add a ZeroMQ I/Q output.
		Support more fine-grained UHD TX gain.
		Make the -C flag optional to simplify the usage.
2014-09-26: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.5)
	* odr-dabmod:
		Change UHD normalisation to reduce risk of nonlinearities.
		Add digital gain setting to RC.
		Fix handling of timestamps when using ZMQ input, for the SFN
		scenario.
2014-05-20: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.4)
	* odr-dabmod:
		Merge patch for USRP1 subdevice setting.
		Merge patch to correct ZMQ input command line
		  argument.
	* generate-firfilter.py:
		Get FIRFilter generator script to work
		  with newer GNURadio versions.
2014-04-04: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.3)
	* odr-dabmod:
		Various UHD improvements, esp. related to
		  external clock input handling.
		ZeroMQ input protocol format updated to avoid
		  frame phase alignment errors (not
		  backward compatible)
		Various cleanup and fixes

2014-03-07: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.2)
	* odr-dabmod:
		Fix frequency/channel choice
		Improvements in ZMQ input reliability
		Use correct syslog identification

2014-02-11: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.1)
	* odr-dabmod:
		Include zmq.hpp and prefer it over the one
		provided by the system.
		Add the channel option to the configuration file
		for the UHD output.
		Replace fprintf calls by correct usage of the
		logging subsystem.
		Fix some compilation warnings.

2014-02-07: Matthias P. Braendli <matthias@mpb.li>
	(v0.4.0)
	* odr-dabmod:
		Renamed CRC-DABMOD to ODR-DabMod
		Fixed version generation
		Fixed missing files in tarball

2014-01-31: Matthias P. Braendli <matthias@mpb.li>
	(tag r11)
	* crc-dabmod:
		Minor improvements in logging, remote control,
		zmq input and autotools

2013-12-14: Matthias P. Braendli <matthias@mpb.li>
	(tag r10)
	* autotools:
		Remove autogenerated files and add bootstrap
		Fix faulty logic for --enable-input-zeromq

2013-11-21: Matthias P. Braendli <matthias@mpb.li>
	(tag r9)
	* crc-dabmod:
		Make generate-filter compatible with newer GNURadio
		Add the FIRFilter tap generation tool
		Remove references to mercurial in ChangeLog

2013-11-10: Matthias P. Braendli <matthias@mpb.li>
	(tag r8):
	* crc-dabmod:
		Added secondary ETI input support.
		Added ZeroMQ ETI input.
		Fixed muting issue on missing timestamps, and
		Added related configuration entry.
		ZeroMQ dependency added in configure.ac
		Versioning changed to make hg revision visible
		Completed READMEs and INSTALLs

2012-09-13: Matthias P. Braendli <matthias@mpb.li>
	(tag r7):
	* crc-dabmod/*:
		Logging implementation cleaned up, and several
		related bugs have been solved.
		Added Boost version check into autoconf

	* crc-dabmod/src/OutputUHD.*:
		Use non-deprecated way of setting clock and time
		for the USRP.


2012-08-26: Matthias P. Braendli <matthias@mpb.li>
	(tag r6):
	* crc-dabmod:
		RemoteControl compatibility issue

2012-08-23: Matthias P. Braendli <matthias@mpb.li>
	(tag r5):
	* crc-dabmod/*:
		Minor fixes to FIRFilter and file configuration

2012-08-17: Matthias P. Braendli <matthias@mpb.li>
	(tag r4):
	* crc-dabmod/*:
		FIRFilter can not be remote-controlled, and supports on-the-fly change
		of the filter taps.

2012-08-16: Matthias P. Braendli <matthias@mpb.li>
	(tag r3):
	* crc-dabmod/*:
		Implemented basic telnet remote control that can change
		some UHD settings, and a syslog-compatible logging system.

2012-08-14: Matthias P. Braendli <matthias@mpb.li>
	(tag r2):
	* crc-dabmod/*:
		Added .INI configuration file parser.

2012-08-01: Matthias P. Braendli <matthias@mpb.li>
	(tag r1):
	* crc-dabmod/*:
		It is now possible to run dabmod with OutputUHD even
		when no external 10MHz reference nor 1PPS are used.

		When using FIRFilter, the TimestampDecoder keeps one delay value
		to compensate for the increased pipeline latency of the FIRFilter.
		As a consequence, it should be possible to synchronise two DABMODs,
		even if only one uses FIRFilter.

2012-06-04  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>

    * BlockPartitioner.cpp BlockPartitioner.h DabModulator.cpp EtiReader.cpp EtiReader.h:
        Solved CIF count synchronisation bug.

2012-02-07  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>

    * DabMod.cpp DabModulator.cpp DabModulator.h: Added gain factor to support UHD scale.
        Added manual DAB mode control.
    * GainControl.cpp GainControl.h: Added gain factor to support UHD scale.
    * Makefile.am kiss_fft129.tar.gz: Updated Kiss FFT library to 1.2.9.

2011-12-15  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>

    * configure.ac: Added Wall option to debug compilation.
        Added mm_malloc macro.
    * src/BlockPartitioner.h: Changed from codec to mux.
    * src/Buffer.cpp src/Buffer.h: New buffer management class.
    * src/DabMod.cpp: Changed from mm_malloc to memalign for Efence support.
        Replaced all fixed memory size with dynamic Buffer class.
        Removed FFTW api.
    * src/DabModulator.cpp src/DabModulator.h: Solved integer overflow bug for CicEqualizer initialisation.
    * src/GainControl.cpp: Added handling of null symbol when gain would be infinity.
    * src/InputMemory.h: Solved debug wrong file name issue.
    * src/kiss_fftsimd.c src/kiss_fftsimd.h: Generic function to pack data for SIMD operations (currently not used).

2011-12-09  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>

    * *: Added support for DAB mode I, III and IV.

2010-07-14  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>

    * configure.ac: Added enable-prof and enable-fft-simd options.
    * src/GainControl.cpp: Changed to system defined variables.
    * src/Makefile.am: Removed code about FFTW and KISS_FFT the only FFT library.
    * src/OfdmGenerator.cpp src/OfdmGenerator.h: Added support for KISS_FFT simd operations.
    * src/PuncturingEncoder.cpp: Solved a bug for last bits (tail) encoding.
    * src/Resampler.cpp src/Resampler.h: Added support for KISS_FFT simd operations.
                                         Removed unused code.
    * src/crc-dwap.py: Adapted to latest Gnuradio version.

2010-02-12  Pascal Charest <pascal [dot] charest [at] crc [dot] ca>
     
    * *: Initial public release