The error performance of CD900-like cellular mobile radio systems

The symbol error performance of CD900-like digital cellular mobile radio systems over narrowband and urban wideband transmission channels was investigated. The basic performance is presented for Gaussian, flat-fading Rayleigh, and log-normal channels in the presence of selection and ratio combining space diversity schemes. For wideband channels having more than one resolvable fading path, a CD900-like system without diversity reception suffers from large residual symbol error probabilities P/sub R/( approximately=10/sup -1/). The introduction of adaptive correlation diversity (ACD) mitigates the effects of multipath, yielding a P/sub R/ of 6*10/sup -5/. Although this P/sub R/ value is relatively low, the probability of symbol error (P/sub e/) versus signal-to-noise ratio (SNR) is significantly poorer than for the Gaussian channel. By combining the ACD scheme with space diversity, the P/sub R/ is eliminated by P/sub e/>10/sup -5/, and the channel SNR is within 5 dB of the Gaussian channel performance when P/sub e/ is 10/sup -10/.<
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