Title :
Bit-error simulation of π/4 DQPSK in flat and frequency-selective fading mobile radio channels with real time applications
Author :
Fung, Victor ; Rappaport, Theodore S.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Bit error rate (BER) results are presented for π/4 differential quadrature phase-shift keying (DQPSK) with Nyquist pulse shaping in flat and frequency-selective fading channels. BER results are shown for a wide range of multipath delays, receiver speeds and power ratios (C/D) between the main ray and the delayed ray in a two ray channel model. Co-channel interference effects are also considered. In addition, the instantaneous BER for π/4 DQPSK in various fading channels is simulated. The simulation is first performed off line, and then bit error patterns are replayed in real time to allow subjective evaluation of link quality between a source and sink. This method is being used to provide real time bit error simulation of US Digital Cellular data channels using simple computer hardware
Keywords :
cellular radio; digital radio systems; digital simulation; error statistics; fading; phase shift keying; radiowave propagation; telecommunication channels; telecommunications computing; BER simulation; DQPSK; Nyquist pulse shaping; USA; bit error patterns; bit error rate; cochannel interference; computer hardware; data channels; delayed ray; digital cellular radio; flat fading; frequency-selective fading channels; link quality; main ray; mobile radio channels; multipath delays; pi /4 differential quadrature phase-shift keying; power ratios; real time applications; receiver speeds; sink; source; subjective evaluation; two ray channel model; Bit error rate; Computational modeling; Computer errors; Computer simulation; Delay; Frequency-selective fading channels; Interchannel interference; Performance evaluation; Phase shift keying; Pulse shaping methods;
Conference_Titel :
Communications, 1991. ICC '91, Conference Record. IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-0006-8
DOI :
10.1109/ICC.1991.162425
