A lattice-theoretic analysis of vector perturbation for multi-user MIMO systems

Ryan, D. J., Collings, I. B., Clarkson, I. V. L. and Heath, R. W. (2008). A lattice-theoretic analysis of vector perturbation for multi-user MIMO systems. In: , IEEE International Conference on Communcations. IEEE International Conference on Communcations 2008, Beijing, China, (3340-3344). 19-23 May, 2008.


Author Ryan, D. J.
Collings, I. B.
Clarkson, I. V. L.
Heath, R. W.
Title of paper A lattice-theoretic analysis of vector perturbation for multi-user MIMO systems
Conference name IEEE International Conference on Communcations 2008
Conference location Beijing, China
Conference dates 19-23 May, 2008
Convener J. Wu
Proceedings title IEEE International Conference on Communcations
Journal name 2008 Ieee International Conference On Communications, Proceedings, Vols 1-13
Place of Publication Piscataway, U.S.
Publisher IEEE
Publication Year 2008
Sub-type Fully published paper
DOI 10.1109/ICC.2008.628
ISBN 978-1-4244-2075-9
ISSN 1550-3607
Start page 3340
End page 3344
Total pages 5
Collection year 2009
Language eng
Abstract/Summary This paper considers the use of multiple transmit antennas to deliver independent data streams to multiple users. In particular, we examine a multi-user technique known as vector perturbation. We provide a new lattice-theoretic approach to analyze its performance in the presence of Rayleigh fading. Vector perturbation is based on performing a channel inversion, with the additional step of perturbing the data signal prior to linear preceding to significantly reduce the required transmit power. To analyze such systems it is necessary to calculate the resulting average energy of the sphere-encoded signal vector, as this determines the signal-to-noise ratio (SNR) at the output of the demodulator. Previous results presented in the literature were partially analytic, requiring further numerical evaluation. Here, we derive a concise approximation to the output SNR. We also provide tight upper and lower bounds on the bit error rate for the reception of QAM symbols using the required modulo demodulator, as a function of the average energy of the sphere- encoded signal vector.
Subjects E1
970101 Expanding Knowledge in the Mathematical Sciences
970109 Expanding Knowledge in Engineering
090609 Signal Processing
0906 Electrical and Electronic Engineering
Keyword MIMO communication
Rayleigh channels
Antennas
Approximation theory
Demodulators
Lattice theory
Quadrature amplitude modulation
Vectors
Q-Index Code E1
Q-Index Status Confirmed Code

 
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