Abstract
Minimum Mean Squared Error (MMSE) detection has been proposed for Direct Sequence-Code Division Multiple Access (DS-CDMA) system. MMSE detectors rely on a known training sequence for initial adaptation, and subsequently switch to decision-directed mode. After the switch, the performance of the adaptive algorithm may degrade if a strong interference suddenly appears. Hence, this paper presents a 'rescue' algorithm that monitors for sudden changes in the signal space, which may be caused by the appearance of a strong interference. It is shown that the presence of low-level background noise, a good estimate can be obtained within a few symbol intervals. A numerical example is given which illustrate the performance of the rescue algorithm in a synchronous DS-CDMA system.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1057-1660 |
| Number of pages | 604 |
| Journal | ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings |
| Volume | 2 |
| State | Published - 1995 |
| Event | Proceedings of the 1995 20th International Conference on Acoustics, Speech, and Signal Processing. Part 2 (of 5) - Detroit, MI, USA Duration: May 9 1995 → May 12 1995 |
ASJC Scopus subject areas
- Software
- Signal Processing
- Electrical and Electronic Engineering