Patent ID: 6430214
Filing Date: 2002-08-06
Classification: A61F,H04L

Abstract:
A fading resistant multi-level QAM receiver, comprising:an antenna; a first mixer coupled to the antenna and to a pilot channel Walsh code despreader and a traffic channel Walsh code despreader; a channel estimation filter coupled to the pilot channel Walsh code despreader and to a conjugate generator; a delay of channel estimation filter coupled to the traffic channel Walsh code despreader; a second mixer coupled to the conjugate generator and to the delay of channel estimation filter; a magnitude generator coupled to the channel estimation filter; a third mixer coupled to the magnitude generator and an M-ary QAM constellation generator; a fourth mixer coupled to the third mixer and to a traffic channel gain estimator; a summer coupled to the second mixer and to the fourth mixer; a magnitude squared generator coupled to the summer; a dual minima soft metric generator coupled to the magnitude squared generator; a de-interleaver coupled to the dual minima soft metric generator; and a decoder coupled to the de-interleaver.