MIMO Precoder Designs for Frequency-Selective Fading Channels Using Spatial and Path Correlation

Multiple-input-multiple-output (MIMO) precoder design for frequency-selective fading channels using partial channel information based on the spatial and path correlation matrices is presented. By representing a frequency-selective fading channel as a multipath model with L effective paths, a general...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology Vol. 57; no. 6; pp. 3441 - 3452
Main Authors: Bahrami, H.R., Le-Ngoc, T.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.11.2008
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Antennas
Applied sciences
Channel capacity
Channels
Circuit properties
Coding, codes
Correlation
Delay
Design engineering
Eigen-beamformer
Eigenvalues
Eigenvalues and eigenfunctions
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Fading
Frequency division multiplexing
Frequency domain analysis
Frequency-selective fading channels
Information, signal and communications theory
Mathematical analysis
Matrices
Matrix methods
MIMO
multiple-input-multiple-output (MIMO)
path correlation matrix
precoder
Radiocommunications
Signal and communications theory
Signal convertors
Signal generators
spatial correlation matrix
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitting antennas
Upper bound
water-pouring
Water-Pouring
MIMO
Spatial Correlation Matrix
Eigen-Beamformer
Precoder
Path Correlation Matrix
Spatial correlation
Eigenvalue
Power allocation
Frequency selector
Optimal design
Selective fading
Frequency selection
Coding
Eigen-beamformer
Fading channels
MIMO system
Channel capacity
Eigenvector
Coding circuit
Correlation matrix
Eigenmode
precoder
Ergodicity
Upper bound
spatial correlation matrix
multiple-input-multiple- output (MIMO)
path correlation matrix
Transmitting antenna
Analytical method
System simulation
water-pouring
Gain
ISSN:0018-9545, 1939-9359
Online Access:Get full text
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Summary:Multiple-input-multiple-output (MIMO) precoder design for frequency-selective fading channels using partial channel information based on the spatial and path correlation matrices is presented. By representing a frequency-selective fading channel as a multipath model with L effective paths, a general precoding structure is proposed and used to derive optimum precoding designs that maximize Jensen's upper bound on the channel ergodic capacity under the transmitted power constraint for two cases, i.e., uncorrelated and correlated channel paths. Analytical results show that, in the uncorrelated case, the precoder structure consists of a number of parallel precoders for frequency-flat fading channels. The power assignment to each precoder and the power allocation over the eigenmodes of each precoder are calculated based on the power of channel paths and the eigenvalues of the transmit correlation matrix. In the correlated case, the precoder structure is an eigenbeamformer with the beams referred to a function of eigenvectors of the Kronecker product of path and transmit correlation matrices. Furthermore, the power allocated to each eigenmode can be obtained from a statistical water-pouring policy that is specified by the product of eigenvalues of the transmit antenna and path correlation matrices. Simulation results for different scenarios indicate that the proposed precoder can increase the ergodic capacity of MIMO systems in a frequency-selective fading environment with spatial and path correlations, and its offered capacity gain is increased with the level of correlation and numbers of antennas and channel paths.
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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2008.919609