> > I'm modifying the gr-sounder project to transmit a 113-bit > legendre sequence > > of the bandwith 32kHz and upconvert to certain frequency in > the range 1MHz > > to 20MHz. At receiver side, the received signal is > downconverted to baseband > > and store the received sequence into a data file. > > There is no way to diagnose what you are doing incorrectly, as > you are > writing your own modified FPGA code. > > However, my question to you is--why are you doing this in the > FPGA at > all? The gr-sounder component was designed as a way of > processing a > very wide bandwidth signal (up to the full baseband bandwidth of the > daughterboard in use). Due to limitations in the transport > speed of > USB, this can *only* be done on the FPGA. > > You describe a baseband waveform of 32 ksps, and you are > storing the > received signal samples to a file. Why don't you just use > the stock > FPGA image and write a simple GNU Radio application?
Thank you so much Johnathan. If writing a new GNU Radio application which implement the same functionality as what you did in gr-sounder, is there any existing project in GNURadio packet, which I can refer to? I'm doing the very similar thing as what you did in gr-sounder, transmitting a 113-bit sequence of the frequency 32kHz modulated as BPSK with the user provided center frequency. The received signal is down converted to baseband and directly stored in a data file. Thank you again Regards, Yan
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