Patent ID: 6661854
Filing Date: 2003-12-09
Classification: H04L

Abstract:
A method of estimating a transmission or telecommunications channel, comprising:using two complementary sequences s(n) and g(n), wherein n=0, 1, . . . , Nâˆ’1, that have a property that a sum of their auto-correlations &PHgr;s,s(n)+&PHgr;g,g(n) is a Dirac function kÂ·&dgr;(n), where &PHgr;s,s(n) is the auto-correlation of s(n) and &PHgr;g,g(n) is the auto-correlation of g(n), k is an integer and &dgr;(n) is a Dirac impulse; time multiplexing the two sequences; and forming a composite signal that includes the two complementary sequences and provides the estimation of the channel.