CDMA with multiuser detection vs. coding
Americo M. C. Correia, Francisco Cercas, António Rodrigues · 2002
This work deals with the asynchronous DS-CDMA reverse link with multiuser detection (MUD) receivers (two stages of parallel interference cancellation) the channel is multipath Rayleigh faded. The trade-off analysis between MUD and channel coding is the main topic. A comparison is made between the maximum throughputs (in bits/s/Hz) achievable using multiuser detection and single user detection, for both single cell and cellular systems. The effect of imperfect power control is also investigated. As in a DS-CDMA system a fixed bandwidth expansion can be allocated to either error correction coding or modulation signal spreading this trade-off is also analysed in conjunction with MUD vs. coding. We suppose that BPSK modulation with coherent demodulation is employed.