Method of effecting channel estimation for a fading channel when transmitting symbol sequences
CA 2046316 C · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Larsson, Lars Gustav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Symbols (y(n-L)) in a symbol sequence transmitted via a fading channel are estimated (~(n-L)) in an equalizer having a channel estimating filter (CEST). An error signal (e(n)) influences an adaptation circuit (10) which controls adjustable coefficients (7) so as to form a channel estimate (c1(n), c2(n) c3(n)), which is adapted during the whole of the symbol sequence. The adaptation circuit (10) performs an adaptation algorithm, which is influenced by mean energy values (U(n)) obtained from the channel estimate in a mean-value-forming circuit (15). Subsequent to fading the adaptation algorithm is able to control the coefficients (7) so that one of the coefficients will erroneously dominate …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 22, 1990 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2012.
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