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