Hi, I am currently implement such scheme that have to pass the information(complex data type) from rx_path to tx_path in benchmark_ofdm. The information (complex data) is said to be channel gain that can be calculated by pilot sequence inserted in ofdm symbol, and it can be get from gr_ofdm_frame_acquisition.cc. And I want to make use of this information for next transmitted packet. So I need a method to implement this scheme.
Here are some methods that I used to implement but got some problems. 1) In gr_ofdm_frame_acqusition.cc, I save the complex data in a file and read this file when I send a packet. But it seems that saving file will slows down the process and causes the packet fail. 2) I rewrite the io_signature in the block of gr_ofdm_frame_acqusition.cc that increase the output port for the complex data. And connect this port to the transmit path. Like this: Rx-USRP -> rx_path --(gr_complex)-- tx_path -> Tx-USRP I know the rx_path and tx_path are parallel in GNU Radio. Is it possible to connect these two block with one port? 3) Maybe I can use gr_message. But I don't know how to use it for the data is complex data type. It seems that gr_message is for string data (unsigned char). Can it use for complex or floating data type? Anyone have any suggestions about these problems, please let me know. I am deeply appreciative. Fisheep -- View this message in context: http://old.nabble.com/Problem-on-passing-complex-data-from-rx_path-to-tx_path-in-benchmark_ofdm-tp29621722p29621722.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
