[Discuss-gnuradio] is it possible to bypass the SAWTEK85591?

Hi, is it possible to bypas the SAWTEK85591? I know rfx2400 can used 2.3 ~ 2.9 GHz, but it seems like i can not used other freqency but 2.4 GHz because of the filter. thank you. James, ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://li

[Discuss-gnuradio] how can I distinguish the first subcarrier in the ofdm spectrum with matlab?

hi, I got data from benchmark_ofdm_tx.py and am looking at the data with matlab. however, it is now easy to distinguish each subcarrier after fft. I can see frequency spectrum but it's not clear which one is first subcarrier. Thanks for your help. James, __

[Discuss-gnuradio] could you give me tips for saving ofdm data? and interpolation?

Hi, I was able to get the data using file_sink with benchmark_ofdm_tx.py self.file_sink = gr.file_sink(gr.sizeof_gr_complex, "filename.dat") self.connect(sef.txpath, self.file_sink) and could see frequency spectrum using fft and fftshift in matlab. also, I extended receive_path.py with file_sin

[Discuss-gnuradio] question about data using read_comple_binary.m

Hi, I add self.file_sink to benchmark_ofdm_tx.py self.file_sink = gr.file_sink(gr.sizeof_gr_complex, "filename.dat") welf.connect(sef.txpath, self.file_sink) and looked at the data with read_complex_binary.m However I am confused with units of x and y axis. for exameple, if I get 2.5e6 for total

[Discuss-gnuradio] how can I look at the data in real time using benchmark_ofdm_rx?

Hi, is it possible to look at the packets coming from benchmark_ofdm_tx with benchmark_ofdm_rx in realtime byte by byte? I am using two rfx2400 with one usrp board and try to transmit and recieve packets. if anyone can give me tips about checking packets, I appreciate that, James, ___

[Discuss-gnuradio] have a question about ofdm subcarriers and transferring data in benchmark_ofdm_tx.py

Hi, In benchmark_ofdm_tx.py, I heard that the middle number of subcarriers among the occupied_tones is alloacted to carry actual data, and the frequency band of each subcarrier depends on the interpolation rate. does it mean that if I change the occupied tones, I can control the number of subcarri

[Discuss-gnuradio] get a waveform of usrp clock 10~64MHz using file_sink

Hi, is it possible to save a waveform of usrp clock using file_sink? I want to save the usrp clock signal like other transmit and receive signals, but due to lack of knowledge, have no idea. Thank you. James, ___ Discuss-gnuradio mailing list Discuss-gn

[Discuss-gnuradio] how to load data in payload of send_pkt in benchmark_ofdm_tx.py, and check with benchmark_ofdm_rx.py?

Hi, I am confusing with send_pkt and payload. How can i load the data that I want to transmit in the packet? and compare with received data using benchmark_ofdm_rx.py? what I tried is adding file_sink to compare the transmit and the receive data, but it seems I can do more with send_pkt. Also, wou

[Discuss-gnuradio] way to save the USRP clock data

Hi, I am trying to save the USRP clock wave using file sink, but confusing which source I have to connect with. could you give me a tip to do this? Thank you. James, ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman

[Discuss-gnuradio] using OFDM to transfer data?

Hi, I am trying to use benchmark_ofdm_tx.py to transfer data or modulate the channels, but can not understand how it makes subcarriers and way to use it. can you give me some idea how to use benchmark_ofdm_tx.py or other ofdm python code for applications? Thank you. James, ___

[Discuss-gnuradio] modulate a subcarrier in benchmark_ofdm_tx.py

Hi, I want to modulate the one subcarrier with a few MHz sinusoidal wave in benchmark_ofdm_tx.py base on rfx2400. However, it's hard for me to modulate one subcarrier. can you give me some advise? Thank you for your help. James, ___ Discuss-gnuradio mai

[Discuss-gnuradio] parameters of benchmark_ofdm_tx.py?

Hi, are there any parameter that I can modify benchmark_ofdm_tx.py for number of subchannels, or amplitude of each subchannels? Also, I want to save the data with benchmark_ofdm_tx.py and benchmark_ofdm_rx.py adding self.connect(self.txpath, gr.file_sink (gr.sizeof_gr_complex, "data.dat")) self

[Discuss-gnuradio] compare data from usrp_siggen.py and usrp_oscope.py

Hi, I compared the data from usrp_siggen.py and usrp_oscope.py using matlab, but wave from usrp_oscope.py data has twice longer wavelength. Could you tell me why this happaned? do I have to change the parameters? Also, I added the self.connect(self.txpath, gr.file_sink (gr.sizeof_gr_complex, "dat

[Discuss-gnuradio] brenchmark_ofdm_tx.py, ursp_siggen.py, and usrp_oscope.py with file.sink.

Hi, I read the George's page and used for looking data from usrp_siggen.py and usrp_oscope.py. This case, amplitude looks reasonable, but wavelenth, usrp-oscope.py is twice longer in plot. and also, I look at the data from brenchmark_ofdm_tx.py and usrp_oscope.py. this case, amplitude is so differ

[Discuss-gnuradio] extend benchmark_ofdm_tx.py with file_sink?

Hi, Can anybody tell me how to save transmit data from benchmark_ofdm_tx.py using file_sink? I added self.file_sink = gr.file_sink(gr.sizeof_gr_complex,"filename.dat") and self.connect(self.txpath, self.file_sink) but using matlab, it does not look right. Thank you. James, _

[Discuss-gnuradio] Could you give some advise how to see data from file_sink?

Hi, I am trying to see data from usrp_siggen.py, but it seems like plot is mixture of I and Q, and not clear as using usrp_oscope.py Could you tell me how to see clear one channel waveform using Matlab? Thank you. James, ___ Discuss-gnuradio mailing lis

[Discuss-gnuradio] example of using gr.vector_source_c

Hi, Could you tell me how to use gr.vector_source_c()? I want to modulate the waveform with it, but can not find the examples. Thank you. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] Save file from two ports using usrp_rx_cfile.py

Hi, I would like to save the trasmit data and the receive data using usrp_rx_cfile.py. How can I open two port at and save data from two ports at the same time? If you have better idea and know better code to apply, could you tell me how to do it? Thank you. Sincerely, James Park