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2008

Vector Precoding for Wireless MIMO Systems and its Replica Analysis

8 years 5 months ago
Vector Precoding for Wireless MIMO Systems and its Replica Analysis
This paper studies a nonlinear vector precoding scheme which inverts the wireless multiple-input multiple-output (MIMO) channel at the transmitter so that simple symbol-bysymbol detection can be used in lieu of sophisticated multiuser detection at the receiver. In particular, the transmit energy is minimized by relaxing the transmitted symbols to a larger alphabet for precoding, which preserves the minimum signaling distance. The so-called replica method is used to analyze the average energy savings with random MIMO channels in the large-system limit. It is found that significant gains can be achieved with complex-valued alphabets. The analysis applies to a very general class of MIMO channels, where the statistics of the channel matrix enter the result via the R-transform of the asymptotic empirical distribution of its eigenvalues. Moreover, we introduce polynomial-complexity precoding schemes for binary and quadrature phase-shift keying in complex channels by using convex rather than ...
Ralf R. Müller, Dongning Guo, Aris L. Moustak
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2008
Where JSAC
Authors Ralf R. Müller, Dongning Guo, Aris L. Moustakas
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