Large-system analysis of joint channel and data estimation for MIMO DS-CDMA systems

Takeuchi K, Vehkaperä M, Tanaka T, Müller R (2012)


Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 58

Pages Range: 1385-1412

Article Number: 6157088

Journal Issue: 3

DOI: 10.1109/TIT.2011.2177757

Abstract

This paper presents a large-system analysis of the performance of joint channel estimation, multiuser detection, and per-user decoding (CE-MUDD) for randomly spread multiple-input multiple-output (MIMO) direct-sequence code-division multiple-access (DS-CDMA) systems. A suboptimal receiver based on successive decoding in conjunction with linear minimum mean-squared error (LMMSE) channel estimation is investigated. The replica method, developed in statistical mechanics, is used to evaluate the performance in the large-system limit, where the number of users and the spreading factor tend to infinity while their ratio and the number of transmit and receive antennas are kept constant. Joint CE-MUDD based on LMMSE channel estimation is compared to several methods of one-shot channel estimation, i.e., methods that do not utilize decoded data symbols to refine the initial channel estimates, in terms of spectral efficiency. Joint CE-MUDD is found to significantly reduce the rate loss caused by transmission of pilot signals when compared to the receivers based on one-shot channel estimation. This holds particularly for multiple-antenna systems. As a result, joint CE-MUDD can provide significant performance gains compared to the receivers based on one-shot channel estimation. © 2011 IEEE.

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APA:

Takeuchi, K., Vehkaperä, M., Tanaka, T., & Müller, R. (2012). Large-system analysis of joint channel and data estimation for MIMO DS-CDMA systems. IEEE Transactions on Information Theory, 58(3), 1385-1412. https://dx.doi.org/10.1109/TIT.2011.2177757

MLA:

Takeuchi, Keigo, et al. "Large-system analysis of joint channel and data estimation for MIMO DS-CDMA systems." IEEE Transactions on Information Theory 58.3 (2012): 1385-1412.

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