Approximate lattice detection in MIMO communications using Jacobi theta functions

Gujrathi, Mandar L. and Clarkson, I. Vaughan L. (2008). Approximate lattice detection in MIMO communications using Jacobi theta functions. In: Proceedings of the 2008 Australian communications theory workshop. 9th Australian Communications Theory Workshop, Christchurch, New Zealand, (135-138). 30 January-1 February 2008. doi:10.1109/AUSCTW.2008.4460835


Author Gujrathi, Mandar L.
Clarkson, I. Vaughan L.
Title of paper Approximate lattice detection in MIMO communications using Jacobi theta functions
Conference name 9th Australian Communications Theory Workshop
Conference location Christchurch, New Zealand
Conference dates 30 January-1 February 2008
Convener Abhayapala, T.
Proceedings title Proceedings of the 2008 Australian communications theory workshop
Journal name 2008 Australian Communications Theory Workshop
Place of Publication New York, U. S. A.
Publisher IEEE
Publication Year 2008
Sub-type Fully published paper
DOI 10.1109/AUSCTW.2008.4460835
ISBN 9781424420377
9781424420384
Start page 135
End page 138
Total pages 4
Language eng
Formatted Abstract/Summary
We consider a multiple-input, multiple-output (MIMO) communication system in which data streams are independently transmitted over a number of antennas and collectively decoded from a number of receiving antennas. The maximum-likelihood (ML) or sphere decoder is known to yield the lowest symbol error rate (SER). However, in the worst case, complexity is exponential in the number of antennas. Seeking to reduce complexity without greatly increasing the SER, we propose an approximate lattice decoder with polynomial arithmetic complexity. The decoder performs unconstrained nonlinear optimisation of a Jacobi theta function that approximates the log-likelihood function. Simulations demonstrate that this decoder performs nearly as well as the sphere decoder in terms of bit error rate (BER) and shows a significant performance enhancement compared to linear and lattice-reduced cancellers.
©2008 IEEE
Subjects E1
970109 Expanding Knowledge in Engineering
970101 Expanding Knowledge in the Mathematical Sciences
090609 Signal Processing
Keyword MIMO communication
Jacobi theta function
Lattice detection
Q-Index Code E1
Q-Index Status Confirmed Code

 
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