A Per-Survivor Processing Receiver for MIMO Transmission Systems With One Unknown Channel Order Per Output Articles
Overview
published in
publication date
- November 2011
start page
- 4415
end page
- 4426
issue
- 9
volume
- 60
Digital Object Identifier (DOI)
International Standard Serial Number (ISSN)
- 0018-9545
Electronic International Standard Serial Number (EISSN)
- 1939-9359
abstract
- The order of a communications channel is the length of its impulse response. Recently, several works have tackled the problem of estimating the order of a frequency-selective multiple-input-multiple-output (MIMO) channel. However, all of them consider a single order, despite the fact that a MIMO channel comprises several subchannels (specifically, as many as the number of inputs times the number of outputs), each one possibly with its own order. In this paper, we introduce an algorithm for maximum-likelihood sequence detection (MLSD) in frequency- and time-selective MIMO channels that incorporates full estimation of the MIMO channel impulse response (CIR) coefficients, including one channel order per output. Simulation results following the analytical derivation of the algorithm suggest that the proposed receiver can achieve significant improvements in performance when transmitting through a MIMO channel that effectively comprises subchannels of different lengths.
Classification
keywords
- channel estimation; dynamic programming; maximum likelihood detection; multipath channels; mutiple-input-multiple-output (mimo); signal processing algorithms; viterbi algorithm