Beamformer preprocessing for enhanced resolution by the MUSIC algorithm (preview)

Author

Lee, Harry ; Wengrovitz, Michael

Author_Institution

Atlantic Aerosp. Electron. Corp., Waltham, MA, USA

fYear

1990

fDate

10-12 Oct. 1990

Firstpage

149

Lastpage

153

Abstract

Addresses the problem of designing a beamformer so as to enhance resolution of one or more clusters of closely-spaced emitters by the MUSIC algorithm applied in beamspace. A new beamformer design approach is presented for this problem, and is assessed for planar emitter scenarios. A metric is introduced which measures the quality of the sample beamspace MUSIC null spectrum. The approach is to construct the beamforming matrix to maximize the metric for a selected cluster. The resultant (directed) beamformer is specific to that cluster. Examples show that use of beamspace MUSIC with the identified beamformers can produce lower resolution thresholds, biases and variances than a variety of other eigenvector approaches.<>

Keywords

matrix algebra; radio direction-finding; signal detection; signal processing; MUSIC algorithm; MUSIC null spectrum; beamformer preprocessing; beamforming matrix; beamspace; beamspace MUSIC; biases; closely-spaced emitters; directed beamformer; direction-finding algorithms; planar emitter; resolution thresholds; variances; Aerospace electronics; Algorithm design and analysis; Clustering algorithms; Integrated circuit noise; Multiple signal classification; Navigation; Sampling methods; Sensor arrays; Silicon carbide; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Spectrum Estimation and Modeling, 1990., Fifth ASSP Workshop on

Conference_Location

Rochester, NY, USA

Type

conf

DOI

10.1109/SPECT.1990.205564

Filename

205564