Multi-channel timing recovery system

H - Electricity – 04 – L

Patent

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Details

H04L 7/00 (2006.01)

Patent

CA 2245899

An "N" channel receiver system (100) includes "N" A/D converters (103a-103b), one per channel, sampling the data received by their respective channels. The sampling rate of the A/D converters (103a-103b) is controlled by a sampling clock signal (104) generated by a timing recovery circuit (107). One rate of the sampling clock is a function of a timing signal (160) applied to the timing recovery circuit (107). The band edge filters (113a-113b) are coupled to each channel of the receiver for producing N distinct timing signals (TSa- TSb) corresponding to the data signals received by each one of the N channels. The N distinct timing signal (TSa-TSb) are coupled to a channel selector (155) for selectively coupling one of the N distinct timing signals having highest SNR to the timing recovery circuit.

L'invention se rapporte à un système récepteur (100) à "N" canaux comprenant "N" convertisseurs A/N (103a-103b), un par canal, échantillonant les données reçues par leurs canaux respectifs. La fréquence d'échantillonage des convertisseurs A/N (103a-103b) est régulée par un signal d'horloge d'échantillonage (104) généré par un circuit de récupération de rythme (107). Une fréquence de l'horloge d'échantillonage est fonction d'un signal de rythme (160) appliqué au circuit de récupération de rythme (107). Les filtres en bordure de bande (113a-113b) sont couplés à chaque canal du récepteur en vue de générer N signaux de rythme distinct (TSa-TSb), correspondant aux signaux de données reçus par chacun de N canaux. Les N signaux de rythme distinct (TSa-TSb) sont couplés à un sélecteur de canaux (55) servant à coupler sélectivement un des N signaux de rythme distinct présentant un rapport signal/bruit (SNR) supérieur au circuit de récupération de rythme.

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