Modified GLRT signal detection algorithm

T. F. Ayoub, A. M. Haimovich

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


The problem of signal detection in unknown Gaussian interference utilizing an adaptive array is considered here. Two modified generalized likelihood ratio test (GLRT) detectors are suggested that improve on the performance of Kelly's GLRT when the interference has low-rank property and the sample support for estimating the array covariance matrix is limited. Under these adverse conditions, the sample covariance matrix might be ill conditioned. This problem may be overcome either by diagonal loading of the covariance matrix or rank reduction of the data. The two modified GLRT detectors are referred to as loaded GLRT (L-GLRT) and reduced-rank GLRT (RR-GLRT), respectively. Expressions are developed for the probabilities of false alarm and detection. The advantage of the proposed detectors is illustrated by numerical examples.

Original languageEnglish (US)
Pages (from-to)810-818
Number of pages9
JournalIEEE Transactions on Aerospace and Electronic Systems
Issue number3 PART 1
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering


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