I mention that problem is not related to USRP, it is a bug in my code and calculations.USRP sends complex samples high-quality less for short distances... Thanks very much
On Sun, May 8, 2022 at 2:38 PM sp h <stackprogra...@gmail.com> wrote: > With this description for removing this frequency-selective channel which > solution exist in digital communications? > > On Sun, May 8, 2022 at 10:36 AM sp h <stackprogra...@gmail.com> wrote: > >> Why when I send a complex file (With USRP x300) with harmonic sequence f1 >> f2 f3 ...fn, In receiver (USRP x310) harmonic sequence gain is changed? >> For example, I have a complex file the FFT of a signal has some harmonic >> peaks f1 f2 ...fn >> gain of harmonic peaks in the original file is: >> f1:2 >> f2:2 >> f3:3 >> f4:4 >> ... >> fn=3 >> >> But receiver loss or amplify harmonic peaks are not consonant >> For example, in the receiver we had: >> f1:5 >> f2:1 >> f3:4 >> f4:7 >> ... >> fn=.1 >> >> So when I used MatLab to convert complex files to Wav and play file >> original file and received file is not exactly the same... >> some higher frequency is suppressed or the sound is more bass. Is this >> subject related to TDH? >> In USRP what's TDH? >> https://en.wikipedia.org/wiki/Total_harmonic_distortion >> can anyone guide me? >> Thanks in advance >> >>
