Spectral efficiency of joint multiple cell-site processors for randomly spread DS-CDMA systems

摘要

We consider a chip-interleaved randomly spread DS-CDMA scheme employed in Wyner's infinite linear cell-array model with flat fading. Focusing on the asymptotic setup, the per-cell spectral efficiencies of the optimum and linear MMSE joint multicell receivers are considered. Performance enhancement as compared to single-cell-site processing is demonstrated. The asymptotic behavior of the two receivers in extreme SNR regimes and in a high cell-load setup is analyzed as well. The impact of chip interleaving vs. symbol interleaving is also considered.