Limited feedback for x-structured precoding in spatial-multiplexing MIMO systems

Chun Tao Lin; Wen-Rong Wu

doi:10.1109/ICICS.2013.6782946

Limited feedback for x-structured precoding in spatial-multiplexing MIMO systems

Chun Tao Lin, Wen-Rong Wu

Department of Electrical and Computer Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

X-structured precoding has been considered a promising precoding method for MIMO systems with maximum-likelihood (ML) receivers. It not only simplifies the precoder design, but allows a low-complexity ML detection scheme. For a real-world precoding scheme, a precoder can only be selected from a codebook and its index is fed back to the transmitter, known as limited-feedback precoding. Due to its special structure, two codebooks are required in X-structured precoding. In this paper, we first investigate how to construct the codebooks for X-structured precoding. Then, we consider the detection problem in limited-feedback X-structured precoding in which the X-structure no longer holds. With group successive interference cancelation, we propose a MIMO detection method to solve the problem. The synergy of the proposed methods yields a low-complexity ML precoding and detection scheme. Simulations show that the proposed methods provide satisfactory results.

Original language	English
DOIs	https://doi.org/10.1109/ICICS.2013.6782946
State	Published - 1 Jan 2013
Event	9th International Conference on Information, Communications and Signal Processing, ICICS 2013 - Tainan, Taiwan Duration: 10 Dec 2013 → 13 Dec 2013

Conference

Conference	9th International Conference on Information, Communications and Signal Processing, ICICS 2013
Country/Territory	Taiwan
City	Tainan
Period	10/12/13 → 13/12/13

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10.1109/ICICS.2013.6782946

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abstract = "X-structured precoding has been considered a promising precoding method for MIMO systems with maximum-likelihood (ML) receivers. It not only simplifies the precoder design, but allows a low-complexity ML detection scheme. For a real-world precoding scheme, a precoder can only be selected from a codebook and its index is fed back to the transmitter, known as limited-feedback precoding. Due to its special structure, two codebooks are required in X-structured precoding. In this paper, we first investigate how to construct the codebooks for X-structured precoding. Then, we consider the detection problem in limited-feedback X-structured precoding in which the X-structure no longer holds. With group successive interference cancelation, we propose a MIMO detection method to solve the problem. The synergy of the proposed methods yields a low-complexity ML precoding and detection scheme. Simulations show that the proposed methods provide satisfactory results.",

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Limited feedback for x-structured precoding in spatial-multiplexing MIMO systems

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