부산대학교 도서관

A method of forming a cross-correlation function [mathematical expression included] mathematically as an inner product of the samples of a received signal r(t) and a replica of the signal modulation function m(t), with a computational burden reduced by many orders of magnitude in pseudonoise (PN) coded ranging applications is accomplished by a two step process. First, a single weighted sum of the signal samples forms a small dimension vector, of the order of tens of elements. Second, the inner product of this vector and vectors of the same dimension of samples of the signal modulation generating function, delayed by arbitrarily many values of the delay parameter τ, result in fine delay resolution correlation function values. The process comparatively entails a relatively small computational burden, does not compromise fidelity, and makes real-time optimal range estimation practical.