Cramer-Rao Bound, MUSIC, and Maximum Likelihood. Effects of Temporal Phase Difference
Abstract
We derived closed-form expressions for the Cramer-Rao Bound, MUSIC< and Maximum Likelihood (ML) asymptotic variances corresponding to the two-source direction-of-arrival estimation where sources were modeled as deterministic signals impinging on a uniform linear array. The choice of the center of the array as the coordinate reference resulted in compact expressions that greatly facilitated our study of effects of temporal phase difference (correlation phase) of the two sources on asymptotic variances of estimation error. These effects were shown to be intensified when the two signals were closely spaced and/or when their normalized correlation magnitude was high. Numerical examples obtained from specializing general formulas agreed with our results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1990
- Accession Number
- ADA230259
Entities
People
- C. V. Tran