Efficient MIMO equalization for downlink multi-code CDMA: complexity optimization and comparative study
Author
Guo, Yuanbin; Zhang, Jianzhong (Charlie); McCain, Dennis; Cavallaro, Joseph R.
Date
2005-02-01Abstract
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.
Description
Conference Paper
Citation
Published Version
Keyword
Type
Conference paper
Citable link to this page
https://hdl.handle.net/1911/19928Metadata
Show full item recordCollections
- ECE Publications [1468]
- Rice Wireless [268]