Wireless communications device performing block equalization...

H - Electricity – 03 – D

Patent

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Details

H03D 1/00 (2006.01) H04L 27/06 (2006.01)

Patent

CA 2596183

A wireless communications device (20) may include a wireless receiver (21) for receiving signals (30) comprising alternating known and unknown symbol portions (31, 32) , and a demodulator (23) connected thereto. The demodulator (23) may include: a channel estimation module (24) for generating respective channel estimates (33) for a prior unknown symbol portion (s) (32), current unknown symbol portion and for future unknown symbol portion (s) ; an autocorrelation module (25) for generating autocorrelation matrices for the prior, current and future unknown symbol portions; a channel match filter module (26) for generating respective channel matching coefficients for the prior and current /future unknown symbol portions; a factorization module (27) for dividing the autocorrelation matrices into respective upper and lower autocorrelation matrices; a transformation module (28) for transforming the channel matching coefficients into upper and lower channel matching coefficients; and a back-substitution module (29) for determining the current unknown symbol portion based upon the upper and lower autocorrelation matrices and channel matching coefficients for the current and prior/future unknown symbol portions .

L'invention concerne un dispositif de communication sans fil (20) pouvant comprendre un récepteur sans fil (21) destiné à recevoir des signaux (30) comprenant des parties symboles connus et inconnus alternantes (31, 32), et un démodulateur (23) connecté au récepteur. Le démodulateur (23) peut comprendre: un module d'estimation de canal (24) destiné à générer des estimations de canal respectives (33) pour une/des partie(s) symboles inconnus antérieurs (32), une partie symboles inconnus courants et une/des partie(s) symboles inconnus futurs; un module d'autocorrélation (25) destiné à générer des matrices d'autocorrélation pour les parties symboles inconnus antérieurs, courants et futurs; un module de filtre d'adaptation de canal (26) destiné à générer des coefficients d'adaptation de canal respectifs pour les parties symboles inconnus antérieurs et courants/futurs; un module de factorisation (27) destiné à diviser les matrices d'autocorrélation en matrices d'autocorrélation supérieures et inférieures respectives; un module de transformation (28) destiné à transformer les coefficients d'adaptation de canal en coefficients d'adaptation de canal supérieurs et inférieurs; un module de substitution arrière (29) destiné à déterminer la partie symboles inconnus courants en fonction des matrices d'autocorrélation supérieures et inférieures et des coefficients d'adaptation de canal pour les parties symboles inconnus courants et antérieurs/futurs.

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