Pilot to data channel power allocation for PCA-DS/CDMA with interference canceler

The purpose of this letter is to examine channel power assignment for multi user direct sequence/code division multiple access (DS/CDMA) uplinks. The c hannels under consideration are pilot channels and data channels. A multius er detector is also included. The pilot channel estimates are used for mult iple access interference (MAI) regeneration, as well as for data channel de tection. Simulation results allowed us to pinpoint optimum pilot-to-data ch annel power ratios (PDR's) for the best bit error rate (BER) performance. I n addition, the optimum PDR's of the receivers with the multiuser detector are high compared with those of conventional receivers without the multiuse r detector. This study may prove helpful in the effort to optimize the chan nel power assignment for channel estimation and coherent detection of syste ms with the multiuser detector.