Patent ID: 7474257
Filing Date: 2009-01-06
Classification: G01S

Abstract:
1. A method for adaptively pulse compressing two or more concurrently received radar return signals occupying a same portion of a frequency spectrum, comprising: a) concurrently receiving said radar return signals as a single superpositioned radar signal, wherein each of said radar return signals includes a plurality of range cells; and b) estimating adaptively a pulse compression filter for each range cell of said plurality of range cells for each of said radar return signals, thereby removing interference between said radar return signals, wherein reiterative minimum mean-square error (RMMSE) estimation is applied to each of said range cells to adaptively estimate a unique pulse compression filter for each said cell, wherein a cost function J k (l)=E[|x k (l)−w k H (l)y(l)| 2 ] is minimized, where each of the number of radars K is individually designated as radar k, for k=1,2, . . . , K that are operating simultaneously in the same spectrum with each said radar k having a distinct transmitted waveform S k , where for each k, {circumflex over (ρ)} k (l)=|{circumflex over (x)} k (l)| α is the compressed estimated power of x k (l) and R=E└v(l) v H (l)┘ is the temporal (range) noise covariance matrix, with 1≦α≦1.7, and the matrix C i (l) is defined as and wherein α is initially set at about 1.7 and decreased during processing to a final value of about 1.