A Novel MIMO-OFDM Channel Estimation and Pilot Structure

doi:10.13190/jbupt.200701.100.huy

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (1): 100-104.doi: 10.13190/jbupt.200701.100.huy

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A Novel MIMO-OFDM Channel Estimation and Pilot Structure

HU Yang, YIN Chang-chuan, YUE Guang-xin

School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2006-01-04 Revised:1900-01-01 Online:2007-03-30 Published:2007-03-30
Contact: HU Yang

Abstract

Abstract:

A novel channel estimation and pilot structure are proposed for multi-input multi-output orthogonal frequency division multiplex (MIMO-OFDM) structure. When the number of OFDM symbols, whose channels keep invariant, equals the number of transmit antennas, the frequency and time domain channel estimation solutions based on superposition-pilot and orthogonal-pilot structure are deduced theoretically. The algorithm loosens greatly the condition for optimal pilot signals and has very low complex-ity and flexible antenna structure, where the design of pilot signals can be easily implemented to obtain the optimal mean square error （MSE） performance. The algorithm has a very big practical value when the number of transmit antennas is 2，3 and 4. Simulation results verified the validity of channel estimation algorithm and pilot structure.

Key words: multi-input multi-output orthogonal frequency division multiplex , channel estimation, superposition-pilot structure, orthogonal-pilot structure

CLC Number:

TN92

HU Yang, YIN Chang-chuan, YUE Guang-xin. A Novel MIMO-OFDM Channel Estimation and Pilot Structure[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(1): 100-104.

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A Novel MIMO-OFDM Channel Estimation and Pilot Structure

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