/spl pi//4-DQPSK on microcellular radio channels with diversity and interference

A analyze the average bit error rate (BER) performance of /spl pi//4-shifted differential quadrature phase shift keying (/spl pi//4-DQPSK) in the presence of multiple independent cochannel interferers in frequency-nonselective fading environments. Nyquist shaped pulses are used and postdetection diversity combining is employed at the receiver. The use of both L-branch postdetection equal gain combining (EGC) and L-branch postdetection selection combining (SC) are considered. Two approaches for representing the cochannel interference are investigated. These are a Gaussian interference model and a synchronous interference model. The accuracies of both of these models are assessed by comparing their BER performances with precise BER results. The precise BER results are obtained by using a combination of analysis and simulation.<<ETX>>

[1]  Steven H. Goode,et al.  A comparison of a limiter-discriminator, delay and coherent detection for pi /4 QPSK , 1990, 40th IEEE Conference on Vehicular Technology.

[2]  F. Adachi,et al.  Postdetection selection diversity reception with correlated, unequal average power Rayleigh fading signals for pi /4-shift QDPSK mobile radio , 1992 .

[3]  Sandeep Chennakeshu,et al.  Performance of differentially detected pi /4-shifted DQPSK with diversity , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.

[4]  L.J. Greenstein,et al.  Microcells in personal communications systems , 1992, IEEE Communications Magazine.

[5]  J. Cavers.  An analysis of pilot symbol assisted modulation for Rayleigh fading channels (mobile radio) , 1991 .

[6]  F. Adachi,et al.  BER performance of QDPSK with postdetection diversity reception in mobile radio channels , 1991 .

[7]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[8]  Robert J. C. Bultitude,et al.  Propagation characteristics on microcellular urban mobile radio channels at 910 MHz , 1989, IEEE J. Sel. Areas Commun..

[9]  V. Fung,et al.  Simulation of bit error performance of FSK, BPSK, and pi /4 DQPSK in flat fading indoor radio channels using a measurement-based channel model , 1991 .

[10]  Pooi Yuen Kam,et al.  Bit error probabilities MDPSK over the nonselective Rayleigh fading channel with diversity reception , 1991, IEEE Trans. Commun..

[11]  Sandeep Chennakeshu,et al.  Differential detection of pi /4-shifted-DQPSK for digital cellular radio , 1993 .

[12]  John H. Lodge,et al.  TCMP-a modulation and coding strategy for Rician fading channels , 1989, IEEE J. Sel. Areas Commun..