Reduced-rank minimum variance receiver for asynchronous CDMA systems

Xiaodong Cai, Ali N. Akansu, Hongya Ge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationIEEE International Conference on Communications
Pages1030-1033
Number of pages4
Volume2
StatePublished - Dec 3 2000
Externally publishedYes
Event2000 IEEE International Conference on Communications - New Orleans, LA, USA
Duration: Jun 18 2000Jun 22 2000

Other

Other2000 IEEE International Conference on Communications
CityNew Orleans, LA, USA
Period6/18/006/22/00

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Cai, X., Akansu, A. N., & Ge, H. (2000). Reduced-rank minimum variance receiver for asynchronous CDMA systems. In IEEE International Conference on Communications (Vol. 2, pp. 1030-1033)