Patent ID: 6504884
Filing Date: 2003-01-07
Classification: H04L

Abstract:
A communication system wherein information is transmitted through a channel having a discrete channel impulse response h(k), where k is a time index, to produce at an output of the channel, a signal, r(k), where: r&it;(k)=A+&Sum;n&it;â€ƒ&it;b&it;(n)&it;h&it;(k-n)+N&it;(k)where:A is DC offset; &Sum;n&it;â€ƒ&it;b&it;(n)&it;h&it;(k-n)â€ƒis a modulated signal transmitted over the channel; b(n) are transmitted data symbols; and N(k) is additive noise. such system comprising: a receiver for receiving the transmitted information, such receiver having a processor programmed to solve the following equations simultaneously: &PartialD;f&it;(e&it;(k))&PartialD;A^=0&PartialD;f&it;(e&it;(k))&PartialD;h^=0â€ƒwhere: f(e(k)) is a function of the estimation error quadratic, e(k), where e&it;(k)=r&it;(k)-A^-&Sum;n&it;â€ƒ&it;[b&it;(n)&it;h^&it;(k-n)].