The adaptive minimum mean-squared error (MMSE) detector for direct-sequence code-division multiple access (DS-CDMA), is attractive because it has simple structure. Also the adaptive nature of the detector allows it to learn the required information and adjust it to the prevailing interference and noise environment. However, it shows performance degradation in severe near-far environment. On the other hand, parallel interference cancellation (PIC) detector has the potential to combat the near-far problem, since it is designed to subtract out interference. However, this performance depends on its data estimates. A novel multiuser detector is proposed in this paper to combat the near-far problem in DS-CDMA schemes. It utilizes the advantages of the two detectors by combining an adaptive MMSE multi-user detector and PIC detector. The focus of this paper is on the near-far resistance capability of the detector. Simulation studies performed on the proposed detector shows that it is immune to the near-far problem on top of its improved bit error rate.
|Title of host publication||Proceedings of the 4th IEEE Conference on Mobile and Wireless Communications Networks (MWCN 2002)|
|Publication status||Published - 2002|
|Event||4th IEEE Conference on Mobile and Wireless Communications Networks (MWCN 2002) - |
Duration: 1 Jan 2002 → …
|Conference||4th IEEE Conference on Mobile and Wireless Communications Networks (MWCN 2002)|
|Period||01/01/2002 → …|