Computationally Efficient Multi-Cell Joint Channel Estimation in TDD-CDMA Systems

Peng XUE  Duk Kyung KIM  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.9   pp.2465-2468
Publication Date: 2010/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2465
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
TDD-CDMA,  multi-cell joint channel estimation,  Cholesky,  block-Toeplitz,  block-Levinson,  

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In this letter, a low complexity multi-cell joint channel estimation (MJCE) scheme is proposed. With proper arrangement of the multi-cell midamble matrix and channel impulse response (CIR) vector, the MJCE operation is formulated to solve a block-Toeplitz linear system. The block-Levinson algorithm is adopted to solve this problem instead of the Cholesky algorithm. Our results show that the proposed MJCE scheme can be a practical choice with significantly lower complexity, compared with the previous schemes with the Cholesky algorithm.