Complex low density lattice codes for the 2×2 MIMO fading channel

Yair Yona, Meir Feder

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A transmission scheme for a 2 × 2 multiple-input multiple-output (MIMO) channel utilizing a complex low density lattice codes (CLDLC's) is presented in this paper. The code is of small size and small degree, and the scheme reduces the number of dimensions per channel use from 2 to 4/3. For decoding, we derive an iterative max-product algorithm for the MIMO channel combined with the code. When the a-priori probabilities are Gaussians, there is an interesting connection between the passed messages and minimum mean square error estimation. Using the CLDLC structure and the reduced dimensionality of the transmission scheme, we present a very efficient parametric decoding algorithm for the 2×2 MIMO channel. At a rate of 8 bits per channel use the proposed simple and computationally efficient transmission scheme outperforms the Alamouti scheme by 3.5 dB, and has a gap of 1.7 dB from the golden code.

Original languageEnglish
Title of host publication2013 51st Annual Allerton Conference on Communication, Control, and Computing, Allerton 2013
PublisherIEEE Computer Society
Pages299-306
Number of pages8
ISBN (Print)9781479934096
DOIs
StatePublished - 2013
Event51st Annual Allerton Conference on Communication, Control, and Computing, Allerton 2013 - Monticello, IL, United States
Duration: 2 Oct 20134 Oct 2013

Publication series

Name2013 51st Annual Allerton Conference on Communication, Control, and Computing, Allerton 2013

Conference

Conference51st Annual Allerton Conference on Communication, Control, and Computing, Allerton 2013
Country/TerritoryUnited States
CityMonticello, IL
Period2/10/134/10/13

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