Performance of a dual-rate DS-CDMA-DFE in an overlaid cellular system

In this paper, performance of a direct-sequence code-division multiple-acce ss (DS-CDMA) system in an overlaid cell environment using a decision feedba ck equalizer (DFE) receiver is presented. It is shown that a DFE receiver c an separate the desired signal from several interfering signals without any loss in the overall capacity, The results indicate that DS-CDMA with a DFE receiver can be used to integrate dual-rate services without adversely aff ecting the system capacity. The overall system capacity is shown to be appr oximately equal to half the spreading gain and is unaffected when interfere rs at different data rates are present. The proposed scheme needs only aver age power control and is not found to be sensitive to power control errors of +/-2 dB.