|
Title:
|
Efficient MIMO equalization for downlink multi-code CDMA: complexity optimization and comparative study |
|
Author:
|
Guo, Yuanbin; Zhang, Jianzhong (Charlie); McCain, Dennis; Cavallaro, Joseph R.
|
|
Type:
|
Conference Paper |
|
Keywords:
|
MIMO equalizer; Multi-code CDMA; complexity |
|
Citation:
|
Y. Guo, J. (. Zhang, D. McCain and J. R. Cavallaro,"Efficient MIMO equalization for downlink multi-code CDMA: complexity optimization and comparative study," in Globecom,, pp. 2513 - 2519. |
|
Abstract:
|
In this paper, we present an efficient LMMSE chip equalizer to suppress the interference caused by the multipath fading channel in the MIMO multi-code CDMA downlink. The block-Toeplitz structure in the correlation matrix is approximated with a block circulant matrix. An FFT-based algorithm is applied to avoid the Direct-Matrix-Inverse (DMI) in the system equation. Hermitian optimization is proposed to further reduce the complexity. A comparative study in both performance and complexity with the Conjugate-Gradient (CG) algorithm is then presented. The simulation shows very promising results for the FFT-based equalizer compared with both the DMI and CG algorithms. |
|
Date Published:
|
2004-11-01 |
