MINIMUM VARIANCE BEAMFORMING WITH SOFT RESPONSE CONSTRAINTS

被引：57

作者：

VANVEEN, BD

机构：

[1] Department of Electrical and Computer Engineering, University of Wisconsin, Madison

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1991年 / 39卷 / 09期

关键词：

D O I：

10.1109/78.134429

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Soft constraints on the beamformer response to the signal are examined in the context of minimum variance beamforming. A quadratic constraint on the beamformer weights is used to control the mean-squared error between a desired response and the actual response in the signal direction. The constraint is purposely chosen to permit distortion of the signal with the goal of achieving improved interference cancellation. Under the assumptions of known signal direction and spectral shape the signal-to-noise ratio is shown to be a nondecreasing function of the mean-square distortion. The distortion presented to the signal is easily computed from the beamformer weights and can be equalized after beamforming if desired. Properties of this beamforming method and its relationship to linearly constrained beamforming are discussed. Simulations verify analytic results and illustrate the utility of the soft constrained approach.

引用

页码：1964 / 1972

页数：9

共 18 条

[11]

Golub G.H., 1983, MATRIX COMPUTATIONS

[12] AN ALTERNATIVE APPROACH TO LINEARLY CONSTRAINED ADAPTIVE BEAMFORMING [J].

GRIFFITHS, LJ ;

JIM, CW .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1982, 30 (01) :27-34

[13] ADAPTIVE MICROPHONE-ARRAY SYSTEM FOR NOISE-REDUCTION [J].

KANEDA, Y ;

OHGA, J .

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING, 1986, 34 (06) :1391-1400

[14]

Lawson C. J., 1974, SOLVING LEAST SQUARE

[15]

OWSLEY NL, 1973, SIGNAL PROCESS, P591

[16] RANK REDUCTION FOR MODELING STATIONARY SIGNALS [J].

SCHARF, LL ;

TUFTS, DW .

IEEE TRANSACTIONS ON ACOUSTICS SPEECH AND SIGNAL PROCESSING, 1987, 35 (03) :350-355

[17]

SONDHI MM, 1986, P ICASSP TOK JAP APR, V2, P981

[18] CONSTRAINED ARRAY OPTIMIZATION BY PENALTY FUNCTION TECHNIQUES [J].

WINKLER, LP ;

SCHWARTZ, M .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1974, 55 (05) :1042-1048

← 1 2 →