Two-Dimensional Pilot-Symbol-Aided Channel Estimation for OFDM Systems with Transmitter Diversity

Won Gi JEON  Kyung Hyun PAIK  Yong Soo CHO  

IEICE TRANSACTIONS on Communications   Vol.E85-B    No.4    pp.840-844
Publication Date: 2002/04/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
2-D channel estimation,  OFDM,  transmitter diversity,  pilot symbol,  MMSE,  

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In this letter, a two-dimensional pilot-symbol aided (2-D PSA) channel estimation technique for coherent orthogonal frequency-division multiplexing (OFDM) systems with transmitter diversity is proposed. The 2-D PSA channel estimator and the corresponding orthogonality condition between the sets of pilot symbols are derived under minimum mean-square error (MMSE) criterion for OFDM systems with transmitter diversity. The proposed estimator is shown to be accurate and effective for tracking variations of channels between multiple transmitter antennas and receiver antennas.