Digital receiver for spread-spectrum signals

H - Electricity – 04 – J

Patent

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Details

IPC codes

H04J 13/00 (2006.01) H04B 1/707 (2006.01) H04B 7/26 (2006.01) H04K 1/00 (2006.01)

Type

Patent

Patent number

CA 2044166

Description

The receiver contains a correlator (TIC) for the correlation of the received signal with a reference code (R(k)) and a digital signal processor for evaluating the results of the correlation. The correlator is constructed as digital, time-integrating, multistage correlator (TIC), the individual stages (K1 to KN) of which are connected on the one hand to a digital delay line (17) fed with the reference code (R(k)) and to which on the other hand a digital signal (S(k)) recovered from the received signal is applied, the length (D) of the delay line (17) being adapted to the maximum expected impulse response of the transmission channel.

Le récepteur comprend un corrélateur (TIC) pour corréler le signal reçu avec un code de référence (R(k)) et un processeur de signal numérique pour évaluer les résultats de la corrélation. Le corrélateur est construit comme un corrélateur numérique multi-étages à intégration temporelle (TIC) dont, d'une part, les étages (K1 à KN) sont reliés à une ligne à retard numérique (17) qui reçoit un code de référence (R(k)) et auquel, d'autre part, est appliqué un signal numérique (S(k)) extrait du signal reçu, la longueur (D) de la ligne à retard (17) étant adaptée à la réponse impulsionnelle maximum attendue du canal de transmission.

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