Abstract:

Wideband active signal processing is realized by wideband correlative processing which has a time scale and time delay 2-D peak value search calculation structure. Aiming at the relatively high estimative precision, the structure must have a high search density, but it would cause a heavy operation capacity which system can not bear. Then the fast algorithm of wideband correlative processing based on conjugate gradient is advanced. The initial  value is calculated by time delay and time-scale scanning process with wide scanning intervals. By the conjugate direction vector with conjugate gradient algorithm, the peak value is gained by iterative calculation which starts from the initial value. The result of simulation shows that the fast algorithm could get the peak value by low operation capacity  and relatively high parameters estimative precision by iterative calculation. The variance of parameters estimation is close to the Crame-Rao low bound (CRLB) inferior limit of wideband correlative processing.