DocumentCode :
86075
Title :
Discrete Receive Beamforming
Author :
Israel, Johannes ; Fischer, Anath ; Martinovic, John ; Jorswieck, Eduard A. ; Mesyagutov, Marat
Author_Institution :
Inst. of Numerical Math., Tech. Univ. Dresden, Dresden, Germany
Volume :
22
Issue :
7
fYear :
2015
fDate :
Jul-15
Firstpage :
958
Lastpage :
962
Abstract :
We present a new approach for analog receive beamforming if phase shifters and amplifiers have finite resolution only. Then, the maximization of the signal-to-interference-plus-noise ratio (SINR) is a discrete optimization problem with a nonconcave objective function. The discrete maximization problem is solved exactly by means of a branch-and-bound algorithm. Based on the Capon method, we derive a new and efficient way of computing upper SINR-bounds for the subproblems occurring at the nodes of the branch-and-bound tree. Results of numerical simulations are provided and compared to an earlier approximate approach.
Keywords :
array signal processing; optimisation; radio receivers; tree searching; Capon method; analog receive beamforming; branch-and-bound algorithm; branch-and-bound tree; discrete maximization problem; discrete optimization problem; discrete receive beamforming; finite resolution amplifiers; finite resolution phase shifters; nonconcave objective function; signal-to-interference-plus-noise ratio; Array signal processing; Arrays; Interference; Signal processing algorithms; Signal to noise ratio; Upper bound; Vectors; Branch-and-bound; SINR maximization; discrete antenna weights; receive beamforming;
fLanguage :
English
Journal_Title :
Signal Processing Letters, IEEE
Publisher :
ieee
ISSN :
1070-9908
Type :
jour
DOI :
10.1109/LSP.2014.2379333
Filename :
6980459
Link To Document :
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