Performance of vector perturbation multiuser MIMO systems with limited feedback

Ryan, Daniel J.; Collings, Iain B.; Clarkson, I. Vaughan L.; Heath, Robert W.

doi:10.1109/tcomm.2009.09.080041

Cited by 79 publications

(76 citation statements)

References 28 publications

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“…It can be seen that BER curve of the proposed scheme is parallel to that of a unit-gain AWGN channel. For comparison with existing literature, we compare the performance of the proposed precoding scheme with that of the vector perturbation method in [22] for the 2-user BC with the same antenna configuration. It can be observed that proposed scheme outperforms the scheme in [22] by about 1 dB, in addition to employing a much simpler precoding scheme.…”

Section: Simulation Resultsmentioning

confidence: 99%

Novel precoding methods for Rayleigh fading Multiuser TDD-MIMO systems

Thiagarajan

Murthy

2014

2014 IEEE International Conference on Communications (ICC)

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In this paper, we consider the diversity order achievable in a Rayleigh fading Multi-User (MU)-MIMO system when CSI is available at the transmitter (CSIT), but not at the receiver (CSIR). Such a scenario is relevant, for example, in Time Division Duplex (TDD) communications, where, due to channel reciprocity, CSIT can be acquired directly by sending a known training sequence from the receiver to the transmitter. We propose a novel, simple-to-implement transmit precoding scheme that converts fading MU-MIMO channels (the multiple access channel, broadcast channel and interference channel) into fixed-gain parallel Gaussian channels, while satisfying an average power constraint. Hence, the proposed precoding scheme achieves an infinite diversity order, which is in contrast with schemes based on perfect CSIR, which at best achieve a finite diversity order. Monte Carlo simulations illustrate the improvement in the BER performance obtainable from the proposed precoding schemes compared to existing diversity schemes.

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Section: Simulation Resultsmentioning

confidence: 99%

Novel precoding methods for Rayleigh fading Multiuser TDD-MIMO systems

Thiagarajan

Murthy

2014

2014 IEEE International Conference on Communications (ICC)

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“…where e b,0,ub mod represents the upper bound of the BER of the conventional modulated symbols in the absence of spatial symbol errors, which may be formulated as [37] e b,0,ub…”

Section: ) Upper Bound Of Ementioning

confidence: 99%

Performance Analysis of Non-Linear Generalized Pre-Coding Aided Spatial Modulation

Zhang

Yang

Hanzo

2016

IEEE Trans. Wireless Commun.

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Abstract-Developed from the recently emerged Generalised Pre-coding aided Spatial Modulation (GPSM) concept, a novel non-linear GPSM scheme based on the powerful Vector Perturbation (VP) philosophy is proposed, where a particular subset of receive antennas is activated and the specific activation pattern itself conveys useful implicit information in addition to the conventional modulated and perturbed symbols. Explicitly, both the infinite and the finite alphabet capacity are derived for the proposed non-linear GPSM scheme. The associated complexity, energy efficiency and error probability are also investigated. Our numerical results show that, as the only known nonlinear realisation within the Spatial Modulation (SM) family, the proposed scheme constitutes to be an attractive solution to the flexible design of 'green' transceivers, since it is capable of striking a compelling compromise amongst the key performance indicators of throughput, energy consumption, complexity and performance. Particularly, in the challenging full-rank scenario, conveying information through RA indices exhibits a lower complexity, a higher energy efficiency and a better error resilience than that of the conventional arrangement.

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“…It is therefore intuitive to adapt the sphere encoder such that the first perturbation vector that is found to satisfy this weight threshold is selected and the search is terminated. In the case when the instantaneous channel is such that the with uniformly distributed inputs, is given as [30] Eb (E{j3})…”

Section: No It a Modified Perturbation Vector Optimizationmentioning

confidence: 99%

Bridging he Gap between linear and non-linear precoding in small- and large-scale MIMO downlinks

Masouros¹,

Sellahurai

Ratnarajah

2014

2014 IEEE International Conference on Communications (ICC)

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We propose a performance-complexity tradeoff for vector perturbation (VP) precoding in the downlink of multiuser multiple input multiple output (MU-MIMO) systems, that bridges the gap between linear and non-linear channel-inversion type precoding. To this end, we introduce a VP design that applies a performance-determined threshold to the desired norm of the precoded signal, to reduce the search through candidate perturbation vectors by the sphere encoder. Once this threshold is met, the search for the perturbation vectors finishes thus saving significant complexity at the transmitter. Towards future largescale MIMO systems, we test the proposed tradeoff in systems with increasing transmit antennas is fixed physical space. While it is known that linear precoding becomes near-optimal in the massive MIMO region when ignoring transmit correlation, a) we show that there still remains a performance gap between linear and non-linear precoding once realistic antenna array deployment is considered and b) we utilize the proposed scalable approach to bridge this gap. The presented analysis and results show that the sum rates achieved are within 90% of those for conventional VP at less than half the computational complexity.

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Performance of vector perturbation multiuser MIMO systems with limited feedback

Cited by 79 publications

References 28 publications

Novel precoding methods for Rayleigh fading Multiuser TDD-MIMO systems

Novel precoding methods for Rayleigh fading Multiuser TDD-MIMO systems

Performance Analysis of Non-Linear Generalized Pre-Coding Aided Spatial Modulation

Bridging he Gap between linear and non-linear precoding in small- and large-scale MIMO downlinks

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