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Recent content by ux

  1. U

    GMSK TX model in Matlab

    see GMSK simulink model
  2. U

    Coherent differential PSK

    See some simulink models in this topic.
  3. U

    Problem is Updated:LMS Equalizer in Simulink

    Re: LMS Equalizer in Simulink Look at some of the simulink models on this link: https://electronix.ru/forum/index.php?showtopic=23652&st=0
  4. U

    Looking for code of 8 psk demodulation

    Re: 8 psk demodulation 8PSK feed-back gardner symbol sync farrow interpolator decision directed phase sync gain control variable delay simulink matlab 7.0 psk8_fb_symbol_sync_fb_phase_sync_agc_2009_08_19.rar
  5. U

    Differential Encoded QPSK (DQPSK) help needed

    I then differentially encode the symbols with: phi_diff_enc(i) = (phi(i) + phi_diff_enc(i-1)) mod 2pi and then i transmit phi_diff_enc across the channel. At the receiver i then decode with: phi(i) = (phi_diff_enc(i) - phi_diff_enc(i-1)) mod 2pi
  6. U

    Why is OFDMA still used despite SC-FDMA better performance?

    Re: OFDMA VS SC-FDMA For OFDM possible channel-adaptive subcarrier bit and power loading. And I think OFDM is better for the channels with spectral zeros.
  7. U

    Please help to verify the correctness of this 8PSK modulatio

    Re: Please help to verify the correctness of this 8PSK modul 8PSK feed-back gardner symbol sync farrow interpolator decision directed phase sync gain control variable delay simulink matlab 7.0. psk8_fb_symbol_sync_fb_phase_sync_agc_2009_08_19.rar Maybe it will help you...
  8. U

    Symbol timing recovery problem for pi/4 QPSK demodulator

    pi/4 dqpsk coherent demodulation simulink matlab R2010a pi4_qpsk_2010_05_07.rar
  9. U

    What are pilot carriers for?

    Unused subcarriers in the middle is needed in order to avoid the problem of DC-offset in the analog quadrature demodulator.
  10. U

    PAPR and RF spectrum flatness

    I think there are examples of systems with the same spectrum flatness but different PAPR. If your question concerns a specific area then I do not know the answer.
  11. U

    PAPR and RF spectrum flatness

    equality of the power spectral subbands?
  12. U

    PAPR and RF spectrum flatness

    Can you ask a question otherwise, more clearly?
  13. U

    PAPR and RF spectrum flatness

    I do not understand the question. PAPR is measured in time domain. PAPR=(max(s))^2/E( (s)^2 ) Spectrum flatness does not depend from PAPR.
  14. U

    need help in dpsk modulation

    Sorry, no chances.
  15. U

    need help in dpsk modulation

    See simulink model: dqpsk_ff_symbol_farrow_sync_fast_agc_2008_05_12.rar
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