Linear Precoding for MIMO Broadcast Channels With Finite-Alphabet Constraints

Wu, Yongpeng; Wang, Mingxi; Xiao, Chengshan; Ding, Zhi; Gao, Xiqi

doi:10.1109/twc.2012.060412.111806

Cited by 61 publications

(67 citation statements)

References 35 publications

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“…where the k-th MS achievable rate R k ({P k }) is the same as its counterpart in MIMO-BC given by Proposition 1 in [13]. Let N t be the normalized maximum transmit power of each BS.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Problem (13) can be solved with a Stiefel manifold based method [16] in which the line-search direction is…”

Section: Block Diagonalization -Alternating Gradient-descent Precodermentioning

confidence: 99%

“…Although the aforementioned studies are all based on Gaussian input assumption, linear precoder optimization for finite alphabet inputs has been investigated for several scenarios including single user MIMO [11,12], MIMO BC [13], MIMO multiple access channels (MAC) [14], MIMO relay channels [15,16], MIMO hybrid-ARQ (HARQ) [17], as well as MIMO wiretap channels [18]. Each case demonstrates performance gain over the laissez faire use of their Gaussian based precoder design counterpart.…”

Section: Introductionmentioning

confidence: 99%

“…We first derive a simple gradientdescent precoder optimization algorithm. To avoid the timeconsuming Monte-Carlo numerical evaluation, we generalize the rate approximation and its gradient in [19] to MIMO-BC model [13] while incorporating the per-BS constraint. Next, we include the BD restriction to our precoder design scheme and subsequently decompose the WSR objective into single user rate objectives.…”

Section: Introductionmentioning

confidence: 99%

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Cooperative multi-cell MIMO downlink precoding for finite-alphabet inputs

Wang

Ding

et al. 2014

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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This work studies the design of linear precoders for cooperative multi-cell MIMO downlink systems with finite alphabet inputs. Traditionally, multi-cell MIMO downlink precoder designs rely on Gaussian input assumption, which may lead to performance loss when the true inputs admit discrete non-Gaussian symbols. In this work, we present optimized precoders by maximizing weighted sum rate (of finite-alphabet-input) under a set of single basestation power constraints. Specifically, we propose a simple gradient algorithm for general multi-cell MIMO downlink channel and a block diagonalization gradient algorithm while supporting interference cancellation.

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“…where the k-th MS achievable rate R k ({P k }) is the same as its counterpart in MIMO-BC given by Proposition 1 in [13]. Let N t be the normalized maximum transmit power of each BS.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Problem (13) can be solved with a Stiefel manifold based method [16] in which the line-search direction is…”

Section: Block Diagonalization -Alternating Gradient-descent Precodermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cooperative multi-cell MIMO downlink precoding for finite-alphabet inputs

Wang

Ding

et al. 2014

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Self Cite

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“…Specifically, with several multi‐input multi‐output (MIMO) base stations each having multiple MIMO mobile terminals, the necessary and the sufficient conditions are derived for the linear interference alignment to deal with the intra‐cell and inter‐cell interferences. Kindly note that the MIMO technique has been recognised as one of the most key transmission technologies because it can bring with the spatial multiplexing gain, the spatial diversity gain and the array gain . Moreover, this system is further studied in from the degree of freedom point of view by the information theoretic analysis method.…”

Section: Introductionmentioning

confidence: 99%

Interference‐tolerating transmission protocol design for three‐cell systems

Wang

Sun

et al. 2014

Trans. Emerging Tel. Tech.

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The three‐cell system each having one cell‐edge mobile terminal (MT) is studied for the scenario of each MT only receiving the interference from the adjacent cell. Based on the observations that the inter‐cell interference could be exploited as a positive role, a two‐time‐slot‐based transmission protocol is designed for this system by allowing the existence of the interference received at MT, which saves one time slot over the conventional time division multiple access yet introduces the inter‐cell interference. In order to tackle the interference at the cell‐edge users, the problem for designing the precoder of the base station in these two time slots is proposed to achieve the potential gain from the new transmission protocol. In this paper, the well‐known criterion of the signal‐to‐leakage‐plus‐noise ratio is employed for designing the precoder in a closed‐form expression to demonstrate the significant gain of the new transmission protocol. Furthermore, an adaptive receiver is designed based on the linear and the nonlinear receivers to further suppress the inter‐cell interference. Simulation results have demonstrated the gain of the designed protocol, the optimised precoder and the adaptive receiver. Copyright © 2014 John Wiley & Sons, Ltd.

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