Multiplex communications – Wide area network – Packet switching
Patent
1995-04-20
1996-05-28
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
379410, H04B 323
Patent
active
055219080
ABSTRACT:
A data communication system is provided including a multicarrier transmitter which encodes and modulates input data into a plurality of carriers, a channel which distorts signals input to it by the transmitter, an echo path which also distorts signals, and a multicarrier receiver which receives signals from the channel and minimizes the distortions through the use of a SIRF. The method of determining the set of time domain SIRF parameters generally includes the steps of approximating the original channel and echo impulse responses, optionally modeling the channel impulse response, optionally modeling the echo impulse response, computing SIRF coefficients based upon the combined approximated or modeled channel impulse response and the approximated or modeled echo impulse response, calculating a SSNR for the calculated SIRF coefficients, and repeating the steps a predetermined number of times to determine those coefficients with the best
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Melsa Peter J. W.
Younce Richard C.
Jarosik Gary R.
Patel Ajit
Safourek Benedict V.
Tellabs Operations Inc.
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