US Patent:
20030071750, Apr 17, 2003
Inventors:
Gerald Benitz - Harvard MA, US
International Classification:
G01S013/90
US Classification:
342/025000, 342/191000, 342/194000, 342/195000
Abstract:
A high-definition radar imaging system and method receives image data and adaptively processes the image the data to provide a high resolution image. The imaging technique employs adaptive processing using a constrained minimum variance method to iteratively compute the high-definition image. The high-definition image I is expressed in range and cross-range as I(r,c)=minR, where is a weighting vector and R is a covariance matrix of the image data. A solution for I(r,c) is approximated by i) forming Y=[x. . . x]/{square root}{square root over (K)} where x. . . xare beamspace looks formed from image domain looks and with y, y, and ydenoting the K×1 columns of Y; ii) computing r=yyand r=yy, and b=ry+ry; computing as and iii) computing I(r,c) as I(r,c)= y-b .