In this paper, with ideal power control and ideal interleaving, the optimization between the processing gain and the coding gain of a constant bandwidth direct-detection spread-spectrum system operating in the environment of Rician fading channel is presented. The BPSK modulation is considered, and binary BCH codes are employed to illustrate the benefit with the optimum design. Also, optimization of the code rate for this channel is presented and discussed numerically. The results of this paper may be a useful guideline for spread spectrum system design.
"Consideration of CDMA and coding in wireless communications", Proc. SPIE 2556, Wireless Communications, (18 September 1995); doi: 10.1117/12.220887; https://doi.org/10.1117/12.220887