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An EM-based iterative receiver for MIMO-OFDM under interference-limited environments

journal contribution
posted on 2007-11-01, 00:00 authored by Jinho ChoiJinho Choi
In this paper, we derive an iterative receiver for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. As MIMO-OFDM is considered for future cellular systems, the iterative receiver is investigated when the co-channel interference (CCI) exists. It is assumed that the CCI's are also OFDM signals. Since a joint detection of the desired signal and CCI is difficult, we only detect the desired signal, while the CCI is assumed to be a (colored) noise. This approach can avoid the channel estimation and detection of the CCI and keep the complexity of the receiver low. The proposed iterative receiver estimates the channel impulse response of the desired signal and the covariance matrix of the CCI for the detection based on a generalized expectationmaximization (GEM) algorithm. Through GEM iterations, we can observe the performance is improved. © 2007 IEEE.

History

Journal

IEEE transactions on wireless communications

Volume

6

Issue

11

Pagination

3994 - 4003

Publisher

IEEE

Location

Piscataway, N.J.

ISSN

1536-1276

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal