Wi-Lan Inc.

Frederick W Price

Kenneth L Stanwood

Israel Jay Klein

Sheldon I Gilbert

Eli Arviv

David Gazelle

Rami Hadar

Steve Pollmann

Jacques Behar

Stephen C Pollmann

Timothy L Gallagher

A system and method for enhancing the performance of an equalizer in a modem. Multiple techniques are disclosed which improve the modem performance. A first technique uses stored parameters for each burst from each remote site to demodulate a received data stream. A second technique compensates for the gain droop caused by storing parameters across each burst. A third technique minimizes errors caused by adapting the equalizer coefficients for each data burst by analyzing the SN ratio and error rate of the received burst. A fourth technique improves the convergence of the equalizer by using a two-part preamble, whereby both parts are transmitted using different modulation techniques. A fifth technique is provided which performs a soft reset of the modem without performing a complete reset of the modem. A sixth technique determines a modem adaptation factor based on the expected modulation type of an incoming burst transmission. A seventh technique calculates a phase correction value for the stored tap values and applies the value to the incoming signal.

Equalizer performance enhancements for broadband wireless applications

Growing community of inventors

Encinitas, CA, United States of America

Frederick W Price