TY - JOUR
T1 - Complexity-reduced iterative MAP receiver for interference suppression in OFDM-based spatial multiplexing systems
AU - Park, Seung Young
AU - Kang, Chung Gu
N1 - Funding Information:
Manuscript received December 18, 2002; revised September 15, 2003, February 27, 2004, and April 6, 2004. This work was supported by the University IT Research Center Project, Korea. S. Y. Park is with the Samsung Advanced Institute of Technology, Suwon 440-600, Korea (e-mail: young@ieee.org). C. G. Kang is with the Department of Radio Communications Engineering and School of Electrical Engineering, Korea University, Seoul 136-701, Korea (e-mail: ccgkang@korea.ac.kr). Digital Object Identifier 10.1109/TVT.2004.832383
PY - 2004/9
Y1 - 2004/9
N2 - In this paper, we propose a reduced-complexity iterative algorithm for joint maximum a posteriori (MAP) detection and the cochannel interferences (CCIs) suppression in orthogonal frequency-division multiplex (OFDM)-based spatial multiplexing systems, also known as multiple-input-multiple-output systems. The receiver employs an iterative architecture in which each iteration stage consists of channel/covariance estimation for CCIs and MAP detection, which suppresses interference while detecting the data. The interference suppression is performed in the MAP detection by whitening the interferences through a combination of the estimated covariance with the conventional MAP detection metric. Moreover, a complexity-reduction scheme is proposed for implementing an iterative MAP receiver without incurring performance degradation. Extensive simulations have demonstrated that the proposed scheme dramatically improves the performance compared to that of an iterative MAP scheme without interference suppression. The receiver complexity is significantly reduced with negligible performance degradation. Furthermore, it also can effectively suppress not only synchronous CCIs, but also all kinds of asynchronous CCIs without any a priori information on the CCIs.
AB - In this paper, we propose a reduced-complexity iterative algorithm for joint maximum a posteriori (MAP) detection and the cochannel interferences (CCIs) suppression in orthogonal frequency-division multiplex (OFDM)-based spatial multiplexing systems, also known as multiple-input-multiple-output systems. The receiver employs an iterative architecture in which each iteration stage consists of channel/covariance estimation for CCIs and MAP detection, which suppresses interference while detecting the data. The interference suppression is performed in the MAP detection by whitening the interferences through a combination of the estimated covariance with the conventional MAP detection metric. Moreover, a complexity-reduction scheme is proposed for implementing an iterative MAP receiver without incurring performance degradation. Extensive simulations have demonstrated that the proposed scheme dramatically improves the performance compared to that of an iterative MAP scheme without interference suppression. The receiver complexity is significantly reduced with negligible performance degradation. Furthermore, it also can effectively suppress not only synchronous CCIs, but also all kinds of asynchronous CCIs without any a priori information on the CCIs.
UR - http://www.scopus.com/inward/record.url?scp=4744376507&partnerID=8YFLogxK
U2 - 10.1109/TVT.2004.832383
DO - 10.1109/TVT.2004.832383
M3 - Article
AN - SCOPUS:4744376507
SN - 0018-9545
VL - 53
SP - 1316
EP - 1326
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 5
ER -