Performance analysis of cellular CDMA networks over frequency-selective fading channel

An effect of multipath fading on the performance of a cellular code-division multiple-access (CDMA) system is analyzed in this paper. A wide-sense stationary uncorrelated scattering (WSSUS) channel model and the coherent binary phase-shift keying (BPSK) with asynchronous direct-sequence (DS) spreading signal are assumed in the analysis. The average error probability for both the forward link and reverse link of a cellular CDMA system over a frequency-selective fading channel using a conventional correlation-type receiver and RAKE receiver are derived. The impact of imperfect power control and channel capacity of a cellular CDMA system is also investigated. The closed forms of average error probability derived in the paper can save a lot of computation time to analyze the performance and channel capacity of a cellular CDMA system. The analytical results show that the performance and maximum transmission rate of cellular CDMA systems degrade with an increase in the number of simultaneous users and the number of interfering cells. The signal-to-interface ratio (SIR) for the reverse link derived in this paper can directly describe the interrelationships among a number of paths, number of users, number of interfering cells, fading factors, and maximum variation of a received unfaded signal.

[1]  M. Pursley,et al.  Performance Evaluation for Phase-Coded Spread-Spectrum Multiple-Access Communication - Part I: System Analysis , 1977, IEEE Transactions on Communications.

[2]  Theodore S. Rappaport,et al.  Performance Evaluation for Cellular CDMA , 1992, IEEE J. Sel. Areas Commun..

[3]  Laurence B. Milstein,et al.  Performance of DS-CDMA with imperfect power control operating over a low earth orbiting satellite link , 1994, IEEE J. Sel. Areas Commun..

[4]  William C. Y. Lee,et al.  Mobile Cellular Telecommunications Systems , 1989 .

[5]  W. C. Y. Lee,et al.  Estimate of channel capacity in Rayleigh fading environment , 1990 .

[6]  Claude E. Shannon,et al.  The Mathematical Theory of Communication , 1950 .

[7]  K.-T. Wu,et al.  Error performance for diversity DS-SSMA communications in fading channels , 1994 .

[8]  Simon Haykin,et al.  Communication Systems , 1978 .

[9]  P. E. Green,et al.  A Communication Technique for Multipath Channels , 1958, Proceedings of the IRE.

[10]  O. K. Tonguz,et al.  Cellular CDMA networks impaired by Rayleigh fading: system performance with power control , 1994 .

[11]  R. R. Gejji.  Forward-link-power control in CDMA cellular systems , 1992 .

[12]  G. L. Turin.  The effects of multipath and fading on the performance of direct-sequence CDMA systems , 1984 .

[13]  Roberto Padovani,et al.  Increased Capacity Using CDMA for Mobile Satellite Communication , 1990, IEEE J. Sel. Areas Commun..

[14]  Andrew J. Viterbi,et al.  On the capacity of a cellular CDMA system , 1991 .

[15]  Abbas Yongacoglu,et al.  Bit-error-rate performance for asynchronous DS-CDMA over multipath fading channels , 1995 .

[16]  L. B. Milstein,et al.  Spread spectrum for mobile communications , 1991 .

[17]  W. C. Y. Lee,et al.  Overview of cellular CDMA , 1991 .