Controlling the Performance of Mdpsk in Bad Scattering Channels
نویسندگان
چکیده
This paper describes a modification of the conventional M-ary Differential Phase Shift Keying MDPSK scheme. This method reduces the number of phases which improves the performance of the system by applying a mathematical method from the combinatorial theory called Balanced Incomplete Block Design BIB-design. It is a coding modulation technique in which the signal is represented by a set of phases selected and controlled by the encoder. Each block is transmitted serially or in parallel with equal energy.
منابع مشابه
Mobile Satellite Channel
In this report, we consider the performance of trellis coded multilevel differential phase-shift-keying (MDPSK) over Rician and Rayleigh fading channels. For operation at L-Band, this signaling technique leads to a more robust system than the coherent system with dual pilot tone calibration previously proposed for UHF. The results are obtained using a Combination of analysis and simulation. The...
متن کاملBER performance of OFDM-MDPSK system in frequency-selective Rician fading with diversity reception
A closed form formula is derived for the bit error rate (BER) of orthogonal-frequency-division-multiplexing (OFDM) with -ary differential-phase-shift-keying (MDPSK) systems in frequency-selective Rayleigh and Rician fading channels with diversity reception. New BER curves are obtained as a function of the rms delay spread of the diffused component for three different types of delay profiles: 1)...
متن کاملAdaptive linear equalization combined with noncoherent detection for MDPSK signals
A novel noncoherent receiver for M{ary di erential phase shift{keying (MDPSK) signals transmitted over intersymbol interference (ISI) channels is presented. The noncoherent receiver consists of a linear equalizer and a decision{feedback di erential detector. A signi cant performance gain over a previously proposed noncoherent receiver can be observed. For an in nite number of feedback symbols, ...
متن کاملThe Performance of Trellis Coded Multilevel ‘DPSK on a Fading Mobile Satellite Channel
In this report, we consider the performance of trellis coded multilevel differential phase-shift-keying (MDPSK) over Rician and Rayleigh fading channels. For operation at L-Band, this signaling technique leads to a more robust system than the coherent system with dual pilot tone calibration previously proposed for UHF. The results are obtained using a Combination of analysis and simulation. The...
متن کاملDecision-feedback differential demodulation of bit-interleaved coded MDPSK for flat Rayleigh fading channels
A novel simple receiver structure for M -ary differential phase–shift keying (MDPSK) transmission over flat Rayleigh fading channels without channel state information is proposed. We apply convolutional codes for error correction and bit–interleaving as appropriate means to combat the effects of fading. In the decoding the hard decisions of the Viterbi algorithm are fed back to enable a more re...
متن کامل