Changelog for liquid-dsp-debugsource-1.3.2-bp155.3.7.x86_64.rpm :

* Mon Oct 24 2022 Dominique Leuenberger - Only BuildRequire fec on x86_64 aarch64, as these are the only architectures fec is being built on.
* Mon Jul 29 2019 Martin Hauke - Update to latest tagged release version 1.3.2
* autotest - runs with random seeds (based on time) for diveristy - output .json file for post-analysis
* build - cleaned up compiler warnings across most platforms - incorporated continuous integration script - compact header APIs across all interfaces in liquid.h - consistent build across Linux and macOS
* agc - added more convenience methods, improved autotest stability
* fft - spwaterfall less verbose with more convenience methods
* filter - new rresamp family of objects to implement rational rate resampling; very useful for fixed buffer sizes - resamp now uses fixed-point phase for faster computation - fixed issues with msresamp2 ordering to have expected roll-off performance - added notch filter design option for firfilt (with autotest)
* framing - completely reworked msource family of objects to use firpfbch2 family of objects for computationally efficient - added preliminary fskframe generator and synchronizer objects
* math - improved functions for speed, is_prime() - improved stability and consistency of root-finding algorithms
* multichannel - added new firpfbchr family of objects for arbitrarily setting number of channels and down-sampling rates
* modem - refactored objects for amplitude modulation/demodulation to use Hilbert transform, added autotest scripts
* nco - improving consistency across platforms- Run spec-cleaner- Update patch:
* liquid-dsp-fix-destdir.diff
* Sat Aug 18 2018 bwiedemannAATTsuse.com- Add reproducible.patch to always compile with SSE3 (boo#1100677)
* Tue Nov 21 2017 jengelhAATTinai.de- Update description and RPM groups.
* Sat Nov 18 2017 mardnhAATTgmx.de- Remove not needed sections from spec file
* Tue Nov 14 2017 mardnhAATTgmx.de- Mention MIT license, see http://liquidsdr.org/license/
* Mon Nov 13 2017 mardnhAATTgmx.de- Rename changelog
* Thu Oct 26 2017 mardnhAATTgmx.de- Update to version 1.3.1.git1508199169.4c9a7514:
* agc: adding squelch autotests (derived from example)
* agc/example: improving squelch example program
* agc: adding squelch functionality back into gain control object
* spwaterfall: reducing to double-buffer; taking log-avg for consolidation
* fft: adding new spwaterfall object
* packetizer/recreate(): forcing return for any condition; keeps compiler happy
* symtrack example: fixing typo with using undeclared/unused variables
* iir filter order doc match param
* fix typo channel frequency docs
* Mon Jul 03 2017 mardnhAATTgmx.de- Update to version 1.3.0.git1494700891.b8300673:
* dispatch to correct destroy call for fec objects
* prevent nans from escaping detector
* if rescaling induces a nan, just call it 0
* clean up after float sum
* makefile.in: Fix overloading of LDFLAGS and CFLAGS
* resamp: add adjust_timing_phase()
* resamp: adding set_timing_phase() method, global comments
* iirfilt: adding internal init() method for setting internal pointers to NULL
* iirfiltsos: moving structure definition inside source file
* iirfilt: defaulting to using internal dotprod object
* iirfiltsos: adding code for using internal dotprod (generally slower)
* build: adding \'LIQUID_\' prefix in mangling macro for consistency
* Update firpfb.c
* Removed unnecessary line
* build: minor adjustments to global include for API parser
* build: trivial adjustments to global include for API parser (linking objects)
* cbuffer: cleaning method comments in global header
* channel: cleaning method comments in global header
* typo
* Removed tau and rate variable
* Added reset_all() to completely reset spgram object including window buffer- Remove patch: - 0001-add-msse-flag-to-makefile.patch (fixed upstream)
* Thu Apr 13 2017 mardnhAATTgmx.de- add patch to fix compilation on Factory - 0001-add-msse-flag-to-makefile.patch
* Thu Apr 13 2017 mardnhAATTgmx.de- Update to version 1.3.0 (tagged release)- specfile cleanup
* Wed Mar 29 2017 mardnhAATTgmx.de- Update to version 1.3.0.git1490785401.9c80330:
* expose frame detection process
* allow android build via cross compile
* channel: cleaning up interface to permit fixed input/output buffer sizes
* ofdmflexframegen: improving API for output buffer of any length
* ofdmframe: adding method to initialize sctype with freq occupation
* ofdmflexframegen: NULL pointers initialize random header, payload
* oframegen: fixing bug where frame assembled flag wasn\'t being cleared
* packetizer: applying sequence whitening (scramble) to all packets
* flexframegen: NULL pointers initialize random header, payload
* ofdmflexframegen: reset() now indicates new symbol needs to be generated
* packetizer: adding internal packetizer version to bump framing protocols
* flexframsync: cleaning up code for frame detection
* window: clear() -> reset()
* cbuffer: clear() -> reset()
* wdelay: clear() -> reset()
* firdecim: clear() -> reset()
* resamp2: clear() -> reset()
* chromosome: clear() -> reset()
* bsequence: clear() -> reset()
* add -msse flag to makefile
* sandbox: updating sandbox to new APIs, cleaning a few examples
* firpfb: adding execute_block() method
* build: moving freqmod and freqdem to be adjacent in liquid.h
* build: trivial change in comment (\'CP-FSK\' should be \'FSK\')
* build: updating history for changes since v1.2.0
* Update iirdes.pll.c
* iirdecim/iirinterp: trivial formatting change in global header
* build: fixing trivial typo in comment in internal header
* build: adding autocorr source as explicit filter target
* build: updating history description to reflect v1.3.0 release
* only set ecx/edx if not unknown
* asgram: fixing functionality to actually generate ascii string
* symtrack: setting bandwidth appropriately
* asgram: clarifying ref/div
* spgram: fixing typo in comment describing create() method
* asgram: increasing resolution of result
* asgram: adding method to set display character set
* qdetector: adding benchmark program
* build: trivial changes to global header, text alignment, comments
* build: bumping internal version number to 1.3.0 in internal header
* firdespm/example: clarifying filter design in plot title
* firdespm: adding prototype method for generating low-pass filter
* firdespm: adding lowpass example program
* firdespm/example: making example a bit more interesting
* must add sse3 cflag if we are going to use sse3 intrinsics ...
* firdespm: adding callback funtion for generic desired response
* define order for msequence
* framegen/framesync: define order for msequence
* eqlms/autotest: define order for msequence
* firdespm: improving callback function example
* run post-detection samples through state machine
* remove spurious new variable
* build: replacing configure\'s --enable-debug with --enable-debug-messages
* remove static -mss3 flag from makefile
* Sat Dec 24 2016 mardnhAATTgmx.de- Update to version 0.0.0.git1478519418.6b55d1c:
* sandbox: adding initial Golay(24,12) product code example
* sandbox/g2412p: implementing basic iteration for code
* examples/modem: making 16-QAM modem as default
* ampmodem: demodulating SSB AM with suppressed carrier without carrier estimation
* agc/autotest: increasing time for convergence
* sandbox: generate working version of Golay(24,12) product code
* sandbox/g2412product_test: testing soft-decion demod performance
* build: updating copyright on primary build files
* cpfskdem: adding functionality for coherent demodulation (needs testing)
* cpfskmodem: computing and compensating for delay appropriately
* cpfskdem: simplfying demodulator interface
* autotest: adding cpfskmodem tests
* sandbox/mskmodem_test: trying to normalize output level of \'matched\' filter
* build: cpfsk_psd_example > cpfskmodem_psd_example
* autotest/cpfsk: adding more autotest scripts (higher modulation order)
* qpacketmodem: adding methods to encode/decode just symbol indices
* const correctness for framegen
* math/poly: wrapping isnan in T_ABS to help compilation w/ certain gcc versions
* rkaiser: adding necessary breaks to rho approximation switch (thanks Jay Kickliter)
* bpacket: fixing malloc/realloc to assign proper length type (not pointer)
* lpc: adding basic length checking before blindly allocating array
* qdetector: clarifying purpose of quadratic polynomial interpolation
* iirdes: fixing dead initialization for dzpk2sosf()
* iirdes: clarifying filter parameter transformation for band-pass/band-stop
* rkaiser: moving boundary condition check to be inside main search loop
* iirdes/ellip: cleaning up debugging statements
* provide _is_assembled for gmskframegen
* constify gmskframegen_assemble
* build: removing config script to guess gcc version
* Fixed array allocators in IIR Filter creator.
* Enable build and install in one step
* filter/ellip: moving unused variable inside macro
* build: cleaning up makefile indentation; making easier to read (hopefully)
* build: adding explicit target for qpacketmodem
* framing/fec: constifying input arrays
* fskdem: cleaning up code to rid compiler of annoying warnings
* cpfskmodem: cleaning up example, making code more legible
* sandbox: cleaning up sandbox code, ridding compiler of warnings
* fskdem/benchmark: commenting out unused variable
* autotest: cleaning up printf formatting
* spgram: adding waterfall plot example (gnuplot)
* channel: adding time-varying multi-path channel object
* define flat-top window
* introduced flat-top window
* define 7 term blackman-harris
* introduced 7term blackman harris
* define triangular window
* introduced triangular window
* windowing: cleaning up windowing methods somewhat, fixing triangular
* spgram: adding option to export to gnuplot
* spgram: updating to simpler interface; needs some work
* spgram: adding print() method, cleaning up examples a bit
* math: moving windowing function definitions to separate file, utilities
* spgram: cleaning up create() interfaces
* spgram: updated create() method to include delay between transforms
* spgram: not clearing internal window on reset, improving waterfall example
* spgram: fixing bug; forgot to increment counters
* spgramcf/example: formatting sample index in steps of thousands
* spgram: incrementing total number of transforms taken
* msource: fixing bug with not admitting enable/disable of source
* build: checking canonical target outside of SIMD override setting
* Mon Dec 14 2015 mardnhAATTgmx.de- Update to version 0.0.0.git1449876928.d1031be: + sandbox: adding test for generic MSK modulation + sandbox/mskmodem_test: using built-in spgram spectral estimate method + sandbox/mskmodem_test: adding options for tx filter type + sandbox/mskmodem_test: fixing integration but for square pulses + sandbox/mskmodem_test: found square pulse workaround + sandbox/mskmodem_test: trying to compensate for delay with demod + sandbox/mskmodem_test: fixing partial-response RCOS pulse timing + sandbox/mskmodem_test: hacking GMSK pulse with half-symbol timing delay + sandbox/mskmodem_test: fixing GMSK pulse timing, counting actual errors + sandbox/mskmodem_test: adding command-line options for filter, mod. index + sandbox/mskmodem_test: using gmsk compensating filter on receiver + sandbox/mskmodem_test: adding options for M-CPFSK (not yet functional) + modem/build: adding cpfsk[mod|dem] objects + modem/build: removing abandoned cpmodem from project + cpfsk: adding example program (not yet functional) + cpfsk: generating initial filters + cpfskmod: adding method to design filter (needs work and testing) + sandbox/mskmodem_test: adding plot of integrated pulse + cpfskmodem: splitting full- and partial-response raised-cosine + cpfskmod: fleshing out modulate() method + cpfskmod: implementing proper pulse shaping for modulation + cpfskmod: implementing reset() method (clearing internal state) + cpfskdem: framing basic functionality + cpfskmodem/example: fixing power spectral density scaling + sandbox/mskmodem_test: adding command-line options for channel offsets + cpfskmodem/example: adding command-line options for channel impairments + sandbox/mskmodem_test: removing redundant SNR line in help/usage + symtrack: adding basic function prototypes + missing header file. + added am block functions. + symtrack: adding initial object creation + symtrack: adding basic example for testing + build: updating script to update copyright license; needs copy + build: adding basic copy for test license + symtrack: updating filter types to comply with new APIs + symtrack: creating internal objects + symtrack: fleshing out basic implementation + symsync: trying to correct for carrier frequency/phase offsets + symtrack: stepping LMS equalizer; needs further testing + build: adding new module \'channel\' to make channel modeling much easier + build: simplifying copyright replacement with python block string + build|copyright: only printing spaces in comments when appropriate + channel: adding carrier frequency/phase offsets + channel: adding multi-path channel impairment + channel: trying to determine reason for strange behavior + channel: block-commenting out multi-path to help find bug + symtrack: invoking reset() when object created + channel: re-enabling multi-path channel + symtrack: fixing typo in set_bandwidth() error message + symtrack: adding method to explicitly set modulation scheme + symtrack: adding primitive data type to symtrack macro + symtrack: adding method to adjust internal NCO phase + build: updating script to update copyright license; needs copy + build: adding basic copy for test license + build: simplifying copyright replacement with python block string + build|copyright: only printing spaces in comments when appropriate + cpfskmodem/example: updating spgram to new API + cpfskmodem: moving prototype to \'modem\' module section in header + cpfskmodem/example: fixing PSD plot scaling + mskmodem/sandbox: updating to new spgram API, fixing PSD plot scaling + mskmodem/sandbox: fixing equalizing filter bandwidth, scaling, etc. + build|copyright: updating terminal date to 2015 in preparation for release + build: adding basic non-coherent M-ary FSK simulation + fskmodem/sandbox: adding high SNR method for demodulation + fskmodem/sandbox: compute proper least-squares demodulator + fskmodem/sandbox: better error checking on input options, etc. + build: adding fskmod/fskdem objects + fskmod: fleshing out M-ary FSK modulator + fskdem: fleshing out M-ary FSK demodulator + fskmodem: adding set of autotests + fskmodem: adding set of benchmarks for modulation/demodulation + fskmodem: using fftwf in demodulator if available + fskmodem: clarifying M-ary FSK modem in example, sandbox + fskdem: clarifying demodulator is not (necessarily) continuous phase + fskdem: adding method to return frequency error estimate + iirfilt: adding simple low-pass create() method + iirfilt: using default low-pass prototype where applicable + iirdecim: adding simplified create_default() method (Butterworth) + iirinterp: adding simplified create_default() method (Butterworth) + fec/bench: fixing bug with decoding array that caused crash + packetizer/bench: passing proper output array to decode method + build/bench: preventing \'unused variable\' compiler warnings + firfarrow/example: cleaning up example somewhat + build/sandbox: preventing \'unused variable\' compiler warnings + fftfilt/autotest: preventing \'unused variable\' compiler warnings + iirfilt/dcblocker-example: cleaning up and improving example + benchmark/iirfilt: adding DC-blocking filter benchmark + firpfbch2: fixing typo in example and autotest programs + resamp2/example: adding cccf example + resamp2/example: cleaning cccf plotting display + build|copyright: cleaning script, removing unused variables, etc. + build/license: updating license in main top-level project files + build/license: updating license in agc module + build/license: updating license in audio module + build/license: updating license in buffer module + build/license: updating license in dotprod module + build/license: updating license in equalization module + build/license: updating license in fec module + build/license: updating license in fft module + build/license: updating license in filter module + build/license: updating license in framing module + build/license: updating license in math module + build/license: updating license in matrix module + build/license: updating license in modem module + build/license: updating license in multichannel module + build/license: updating license in nco module + build/license: updating license in optim module + build/license: updating license in quantization module + build/license: updating license in random module + build/license: updating license in sequence module + build/license: updating license in utility module + build/license: updating license in vector module + build/license: updating license in autotest library + build/license: updating license in sandbox programs + build/license: updating license in benchmark library + build/license: updating license in scripts + qpacketmodem: new object to simplify encoding and modulating + qpacketmodem: adding autotest script + qpacketmodem/autotest: adding autotests for different modulation schemes + flexframesync: adding autotest (noise-free detection, decoding) + qpilot[gen|sync]: new objects to inject pilots and recover symbols + qpilotsync: fleshing out carrier freq/phase, gain recovery + qpilotsync: wrapping print statements in debug preprocessor exclusion + qpilotgen/qpilotsync: cleaning print outputs + frame64: using new qpacketmodem and qpilotgen/qpilotsync objects + qpacketmodem: adding performance simulation for BER vs. SNR + qpacketmodem: adding soft-decision demodulation/decoding + fskmodem/example: cleaning up example command-line options + build: adding an option to override SIMD extensions in configure + build: splitting ARM target versions in configure (neon supported with v7+) + gmsk/sandbox: adding two new programs + eqlms: adding new create_lowpass() method to init with low-pass filter + build: adding missing objects to \'clean\' target in makefile + firpfbch/examples: cleaning example code a bit + qdetector: adding initial code (not yet functional) + qdetector: fleshing out execute() method + qdetector: breaking buffer into halves, basic signal scaling + qdetector: fleshing out alignment code, offset estimation + qpilotsync: fixing bug with indexing (had hard coded fft size) + firpfb: adding set_scale() method for convenience + qdetector: returning pointer to data array upon detection, offset estimates + qdetector: recovering symbols from detector output in example + framesync64: incorporating qdetector_cccf object into synchronizer + firpfb: adding set_scale() method for convenience + framesync64: setting output matched filter scaling appropriately + framesync64: correcting timing offset appropriately + frame64: using QPSK for preamble p/n sequence + framesync64: cleaning up code for clarity + framesync64: adding basic eqlms_cccf object in receiver + qdetector: removing verbose print statements (debugging) + frame64: extending frame for longer filter, better response + qdetector: increasing fft size to be at least double sequence length + frame64: extending frame length to help flush buffers + firdes: cleaning up code a bit + firdespm: fabsf() -> fabs() for double-precision operation + math/poly: adding macros for abs (fabsf, cabsf, etc.) for specific data types + matrix: adding descriptions to methods in global header + matrix: adding macros for abs (fabsf, cabsf, etc.) for specific data types + qdetector: adding basic autotest scripts + qdetector: improving debug print/export features + framesync64: adding pre-processor macro for enabling/disabling equalizer + qdetector: adding method to set detection threshold + qdetector: adding methods to retrieve sequence and length + qdetector: separating create() methods for generic create vs. w/ symbols + qdetector: cleaning up example program + qpilotsync: adding methods to return estimated parameters + qpilotsync/autotest: adding initial autotest script + qpilotsync/autotest: extending to include more cases + flexframe: complete overhaul of framing protocol + qpacketmodem: cleaning packet modem code a bit + packetizer: adding simple fec/crc scheme access methods + modem: cleaning up header code, adding get_scheme() access method + qpacketmodem: printing mod/fec/crc types to stdout + qpacketmodem: adding regular acess methods for crc/fec/mod etc. + flexframesync: returning frame types (modulation/coding/check schemes) + flexframesync: computing error vector magnitude for frame + flexframe: cleaning up source code, removing unnecessary declarations + flexframesync/debug: consolidating all figures into single plot + flexframegen: resetting object on assemble() if frame is already assembled + flexframegen: modifying API to write frame in arbitrary block size + flexframesync: fixing bug where callback passed wrong flag for header validity + framedatastats: adding new object for accumulating frame data statistics + flexframesync: adding data statistics accumulator to internal object + flexframesync/example: restoring channel impairments to received signal + flexframesync: adding methods to reset and retrieve frame data stats + flexframesync: updating frame statistics in proper location + qdetector: create_symbols() -> create_linear() + qdetector: adding create_gmsk() method, adding autotests + flexframesync: fixing bug with updating frame data payload stats + flexframesync/example: significantly cleaning up reconfig example + framing: adding new symstream object to modulate random symbols + symstream: adding basic example + symtrack/example: using new symstream object for generating input + ofdmflexframe: changing VERSION macro to PROTOCOL + ofdmflexframe: moving internal methods defs out of global header + framing: removing antiquated readme + agc: applying limit to prevent gain explosion + eqlms: adding push_block() method; need decim mode + eqlms: adding autotest (qpsk symbols, blind equalization) + firdecim: cleaning up trivial typo in commented description + eqlms/autotest: cleaning up test to use complex channel + qdetector: adding create_gmsk() method, adding autotests + qdetector: adding method to set carrier offset search range + build|copyright: updating script\'s output to be more compact + build|copyright: updating copy on newer files + build|copyright: adding basic error checking to script + build|copyright: fixing formatted print typo in script + build|copyright: updating channel and framing to new copyright + build: trivial license clarification in main README + build: adding channel module to list in main README + channel: splitting plot in example program + channel: generating repeatable channel coefficients using msequence + channel: adding resampling option; needs timing phase offset setting + channel: adjusting parameters in example program + channel: fixing application of carrier frequency offset + symtrack: defaulting equalizer to low-pass filter + eqlms: adding decision-directed equalization autotest + symtrack: adding option to run at any integer samples/symbol + symtrack/example: using symstream to generate symbols + build: fixing typo in README regarding license + crc: adding method to simply append key to end of message (and check) + spgram: adding option to create default spgram + examples: adding new conversion example program + channel/example: cleaning up symtrack example (trivial) + symtrack/example: fleshing out example description + framing: adding new multi-source signal generator for convenience testing + msource: cleaning up example, interface allows gain in dB + channel: cleaning up channel example a smidge + channel/example: using symstream for signal generation + msource: using symstream for internal signal generation + msource: adding method to remove objects in source list + ofdm[flex]framesync: fix typos + ofdmflexframesync: buffer payload symbols and pass them along with framestats + channel: fixing trivial typo + channel: adding basic code for log-normal shadowing + sandbox: adding shadowing test for distribution and PSD + autotest: wrapping macros in braces to ensure proper scope + Fix LDFLAGS in makefile.in to respect environment variables. + cpfskmodem/example: cleaning up example code somewhat + cpfsk: adding new example to plot psd for different pulse shapes + examples/resamp_crcf: cleaning up output plots + resamp: setrate() -> set_rate() for consistency + resamp: adding method to adjust resampling rate + channel: adding method to get nominal delay (samples) + ofdmframesync: fixing typo with debug_disable (thanks, Andre) + autotest: adding option to print output .json file + firfilt: adding option to create firfilt with rect coefficients + channel: adding separate method to create object with specific delay + eqlms: adding new method to execute block using blind method + eqlms: adding special method for stepping with blind estimation + firpfb: adding method to create filterbank with Kaiser filter coefficients + filter/firdes: consolidating firdes_nyquist() and firdes_rnyquist() + firinterp: create_prototype() -> create_kaiser() + firdecim: create_prototype() -> create_kaiser() + firinterp: create_[r]nyquist() -> create_prototype() + firdecim: create_[r]nyquist() -> create_prototype() + sandbox: adding program to test recursive QPSK constellation + sandbox/recursive_qpsk_test: adding QPSK BER to plot + math: adding simple raised-cosine tapering window + msresamp2: increasing half-band multi-stage resampling stages to 16 + optim/gasearch: adding random chromosome at end of population + configure.ac: use AC_CONFIG_MACRO_DIR + examples: fixing typo in README.md + use header modem to generate random header symbols
* Sun Feb 08 2015 mardnhAATTgmx.de- Update to version 0.0.0.git1423332981.39dd78f: + iirfilt/example: cleaning up example code, improving plots + nco: simplifying internal phase-locked loop + nco/pll/autotest: tightening tolerance, printing phase/freq errors + autotest: adding option to randomize tests + autotest: fixing bug with printing results (random mode) + autotest: adding methods to print list of tests/packages + iirfilt: adding DC-blocking example program + resamp: adding create_default() method for simple operation + lpc/example: refining example slightly + firfilt: adding cccf example to demonstrate cross-correlation
* Wed Jan 14 2015 mardnhAATTgmx.de- Update to version 0.0.0.git1417963874.0379b88: + gmskframe: adding readme to describe framing structure + fft/spgram: moving object declaration to macro + fft/spgram: moving internal object definition to macro + fft/spgram: adding spgramf object (real inputs) and example + agc/build: fixing trivial typo, formatting + fft/asgram: moving internal object definition to macro + fft/asgram: adding \'print\' method for API simplicity + fft/spgram: fixing bug with output array size in execute() + fft/asgram: adding real-valued ascii spectrogram example + fft/asgram: cleaning up examples descriptions + fft/spgram/asgram: separating push() from write() methods + fft/spgram: adding simple method to convert to dB with FFT shift + fft/spgram: fixing fftshift bug with execute_psd() + fft/spgram: adding simple weighting factor for PSD estimate + eqlms: adding internal timer for weight adjustment + firhilb: adding [interp|decim]_execute_block() methods + filter|firhilb: cleaning up Hilbert transform example + firpfbch/sandbox: adding forward declaration of internal methods + symsync: adding symbol synchronizer autotest + symsync: adding simpler symsync example, improving description + symsync/autotest: running different timing scenarios + symsync/autotest: adding rrrf class test suite + symsync: adding rate adjustment to help pull in sample rate offsets + resamp: clarifying internal enumumerated state + fft/spgram: scaling gain by sqrt(2) so output level matches + buffer/wdelay: cleaning up code, adding descriptive comments + build: add DESTDIR support in makefile for RPMs, custom installation + fft/spgram: moving object declaration to macro + fft/spgram: moving internal object definition to macro + fft/spgram: adding spgramf object (real inputs) and example + build: removing unnecessary vpath make directive + ofdmframesync: cleaning up synchronization example a bit + ofdmframesync: simplifying frame sync example