PERFORMANCE ANALYSIS OF CELLULAR CDMA NETWORKS OVER FREQUENCY-SELECTIVE FADING CHANNEL

An effect of multipath fading on the performance of a cellular code-di vision multiple-access (CDMA) system is analyzed in this paper. A,Fide -sense stationary uncorrelated scattering (WSSUS) channel model and th e coherent binary phase-shift keying (BPSK) with asynchronous direct-s equence (DS) spreading signal are assumed in the analysis. The average error probability for both the forward link and reverse link of a cel lular CDMA system over a frequency-selective fading channel using a co nventional correlation-type receiver and RAKE receiver are derived. Th e impact of imperfect power control and channel capacity of a cellular CDMA system is also investigated. The closed forms of average error p robability 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 transmi ssion rate of cellular CDMA system degrade with an increase in the num ber of simultaneous users and the number of interfering cells. The sig nal-to-interference ratio (SIR) for 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 max imum variation of a received unfaded signal.