Abstract
The optimum receiver to detect the bits of multiple CDMA users has exponential complexity in the number of active users in the system. Previous work showed that the successive and parallel soft interference cancellers correspond to nonlinear programming relaxations of the optimum multiuser detection problem. In this paper, we use this approximation method combined with the slowest descent approach to improve the performance of soft interference cancellers. The aim is to achieve a performance closer to the performance of the optimum receiver without significantly compromising the low complexity of the resulting receiver. We derive the resulting detectors and evaluate their performance. Results show that they can achieve near-optimum performance and outperform several previously proposed multiuser detectors.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 550-554 |
| Number of pages | 5 |
| Journal | IEEE International Conference on Communications |
| Volume | 2 |
| State | Published - 2001 |
| Event | International Conference on Communications (ICC2001) - Helsinki, Finland Duration: Jun 11 2000 → Jun 14 2000 |
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering