SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

Acta Metallurgica Sinica(English letters) ›› 2008, Vol. 15 ›› Issue (3): 100-104.doi:

SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

姜政秦晓芳张欣杨大成

Wireless Theories and Technologies Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2007-10-18 修回日期:1900-01-01 出版日期:2008-09-30

SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

JIANG Zheng, QIN Xiao-fang, ZHANG Xin, CHANG Yong-yu

Wireless Theories and Technologies Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2007-10-18 Revised:1900-01-01 Online:2008-09-30

摘要/Abstract

摘要：

A new Turbo iterative receiver structure is proposed for the uplink multiple-input multiple-output orthogonal frequency division multiple access (MIMO-OFDMA) systems. The space-alternating generalized expectation-maximization (SAGE) algorithm is naturally embedded in the framework of iterative receiver to perform synchronization and detection using the Turbo detector outputs. In each iteration, the expectation step intends to remove the multiple access interference (MAI) caused by other asynchronous users, and the maximization step is utilized to estimate the required parameters (i.e., timing offset, carrier frequency offset, channel state information, etc.) sequentially for each user. Simulation results show that the proposed algorithm can approach the performance of ideal receiver closely, while the processing complexity is rather lower than the conventional detectors.

关键词:

;SAGE,;iterative;receiver,;synchronization,;channel;estimation

Abstract:

Key words:

SAGE;iterative receiver;synchronization;channel estimation

JIANG Zheng, QIN Xiao-fang, ZHANG Xin, CHANG Yong-yu. SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems[J]. Acta Metallurgica Sinica(English letters), 2008, 15(3): 100-104.

参考文献

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SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

SAGE based iterative receiver for joint synchronization and channel estimation in uplink MIMO-OFDMA systems

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