Abstract
Minimum variance receiver has recently been proposed to blindly suppress the multiple-access interference in CDMA channels by minimizing the receiver's output variance based on constrained optimization. In this paper, we consider the reduced-rank minimum variance receiver in asynchronous CDMA channels. The reduced-rank detector uses a reduced rank approximation of the covariance matrix of the received data. When the covariance is known, the reduced-rank receiver cannot perform better than the full-rank receiver. However, when the covariance matrix is estimated, we demonstrate that the optimal reduced-rank receiver outperforms the full-rank receiver. The reduced-rank receiver is implemented adaptively using a subspace tracking algorithm; its performance is better than the conventional full-rank recursive least-square adaptive receiver.
Original language | English (US) |
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Pages | 1030-1033 |
Number of pages | 4 |
State | Published - 2000 |
Event | 2000 IEEE International Conference on Communications - New Orleans, LA, USA Duration: Jun 18 2000 → Jun 22 2000 |
Other
Other | 2000 IEEE International Conference on Communications |
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City | New Orleans, LA, USA |
Period | 6/18/00 → 6/22/00 |
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering