TIME DELAY ESTIMATION VIA GENERALIZED CORRELATION WITH ADAPTIVE SPATIAL PREFILTERING.

The use of adaptive beamforming prior to generalized correlation (GC) is demonstrated as a means of time-delay-estimate (TDE) bias reduction in interference-dominated environments. Analysis of GC TDE bias with both minimum-variance distortionless response and conventional delay-and-sum beamforming is given. At high interference-to-noise ratios, theoretical and simulation results indicate that the adaptive structure can facilitate improved delay estimation performance compared to conventional methods.

Duke Scholars

Author Jeffrey L. Krolik Electrical and Computer Engineering