Re: [Discuss-gnuradio] rx_ofdm example

2017-09-26 Thread Michael Dickens
Hi Shi - I'd recommend you find and review the paper cited in the S&C OFDM sync block's info: Schmidl, T.M. and Cox, D.C., "Robust frequency and timing synchronization for OFDM", Communications, IEEE Transactions on, 1997. I'm guessing it will describe in detail what you're looking for. Hope this

Re: [Discuss-gnuradio] rx_ofdm example

2017-09-26 Thread Shi Yang
I read the page about schmidl&cox ofdm synch. block and now I know the frequency mod block is here to normalize the fine frequency offset. But why the sensitivity is -2/fft_len instead of 2/fft_len? Can somebody explain that to me? And I still did not understand what are the delay and multiply b

[Discuss-gnuradio] rx_ofdm example

2017-09-26 Thread Shi Yang
Hi folks, I have a question about the rx_ofdm example. I have read the packet data transmission page on gnuradio.org (https://gnuradio.org/doc/doxygen/page_packet_data.html), but did not find the answer I wanted. The schmidl&cod ofdm synch. block outputs the frequency offset to a frequency modu