FIXED: Linking fails with undefined symbol on MacOS 10.7 #1
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Linking CXX shared library libgnuradio-rds.dylib
Undefined symbols for architecture x86_64:
"boost::system::system_category()", referenced from:
global constructors keyed to gr_rds_bpsk_demod.cc in
gr_rds_bpsk_demod.cc.o
__Z41__static_initialization_and_destruction_0ii.clone.79 in
gr_rds_data_decoder.cc.o
global constructors keyed to gr_rds_data_encoder.cc in
gr_rds_data_encoder.cc.o
global constructors keyed to gr_rds_rate_enforcer.cc in
gr_rds_rate_enforcer.cc.o
global constructors keyed to gr_rds_freq_divider.cc in
gr_rds_freq_divider.cc.o
"boost::system::generic_category()", referenced from:
global constructors keyed to gr_rds_bpsk_demod.cc in
gr_rds_bpsk_demod.cc.o
__Z41__static_initialization_and_destruction_0ii.clone.79 in
gr_rds_data_decoder.cc.o
global constructors keyed to gr_rds_data_encoder.cc in
gr_rds_data_encoder.cc.o
global constructors keyed to gr_rds_rate_enforcer.cc in
gr_rds_rate_enforcer.cc.o
global constructors keyed to gr_rds_freq_divider.cc in
gr_rds_freq_divider.cc.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]: *** [src/lib/libgnuradio-rds.dylib] Error 1
make[1]: *** [src/lib/CMakeFiles/gnuradio-rds.dir/all] Error 2
make: *** [all] Error 2
Changed x perms on files
…00 to 50000 Hz. This greatly reduces CPU usage, and doesn't appear to have any effect on the performance of the receiver. Without this change, the flowgraph can't even keep up on my relatively powerful system (Core i5-2520M CPU @ 2.50GHz), resulting in stuttering audio and RDS decoding errors.
…lating the L-R and RDS channels.
This reduces noise, and ensures that the pilot amplitude is equal to one, so that the L-R signal is not attenuated. Before this fix, it was so low that stereo audio could not be heard.
According to this document, the transmitter uses an RRC filter with alpha=1, so I assume the receiver would work best with a matched RRC filter: http://www.db-thueringen.de/servlets/DerivateServlet/Derivate-18898/54_IWK_2009_1_0_08.pdf
Various improvements to the sample GRC flowgraph
The previous demodulator was using the stereo pilot as a phase reference for the RDS PSK demodulator, but this doesn't always work because some stations (several in my area) do not seem to have their RDS modulator locked to their stereo pilot. GNU Radio's MPSK receiver block uses a Costas loop to recover the PSK carrier and decodes these stations well.
Various improvements to the sample GRC flowgraph
…constantly rescaling.
Set V scale parameter for the RDS constellation plot to stop it from con...
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Linking CXX shared library libgnuradio-rds.dylib
Undefined symbols for architecture x86_64:
"boost::system::system_category()", referenced from:
global constructors keyed to gr_rds_bpsk_demod.cc in
gr_rds_bpsk_demod.cc.o
__Z41__static_initialization_and_destruction_0ii.clone.79 in
gr_rds_data_decoder.cc.o
global constructors keyed to gr_rds_data_encoder.cc in
gr_rds_data_encoder.cc.o
global constructors keyed to gr_rds_rate_enforcer.cc in
gr_rds_rate_enforcer.cc.o
global constructors keyed to gr_rds_freq_divider.cc in
gr_rds_freq_divider.cc.o
"boost::system::generic_category()", referenced from:
global constructors keyed to gr_rds_bpsk_demod.cc in
gr_rds_bpsk_demod.cc.o
__Z41__static_initialization_and_destruction_0ii.clone.79 in
gr_rds_data_decoder.cc.o
global constructors keyed to gr_rds_data_encoder.cc in
gr_rds_data_encoder.cc.o
global constructors keyed to gr_rds_rate_enforcer.cc in
gr_rds_rate_enforcer.cc.o
global constructors keyed to gr_rds_freq_divider.cc in
gr_rds_freq_divider.cc.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]: *** [src/lib/libgnuradio-rds.dylib] Error 1
make[1]: *** [src/lib/CMakeFiles/gnuradio-rds.dir/all] Error 2
make: *** [all] Error 2