System and method for measuring channel quality information

Details System and method for measuring channel quality information System and method for measuring channel quality information

H - Electricity

04

B

H04B 17/00 (2006.01) H04L 1/00 (2006.01) H04L 1/20 (2006.01) H04L 1/12 (2006.01) H04Q 7/34 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2244428

A system and method to measure channel quality in terms of signal to noise ratio for the transmission of coded signals over fading channels. A Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes and at different mobile speeds. The filtered metric is mapped to the signal to noise ratio per symbol using a threshold based scheme. Use of this implicit signal to noise ratio estimate is used for the mobile assisted handoff and data rate adaptation in the transmitter.

Système et méthode permettant de mesurer la qualité d'un canal du point de vue du rapport signal-bruit aux fins de la transmission de signaux codés sur des canaux à évanouissement. Une mesure du trajet à vraisemblance maximale par décodeur de Viterbi permet de déterminer la qualité de canal. La mesure de distance euclidienne est filtrée afin d'éliminer les variations à court terme. La mesure filtrée ou moyenne donne une indication fiable de la qualité de canal, qui demeure uniforme pour différentes techniques de modulation par codage et différentes vitesses de stations mobiles. La mesure filtrée est mise en correspondance avec le rapport signal-bruit par symbole au moyen d'une technique à seuil. Cette estimation de rapport signal-bruit implicite est utilisée pour le transfert assisté du service mobile et l'adaptation du débit de données de l'émetteur.

Affiliated with

Also associated with

Rating

System and method for measuring channel quality information does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for measuring channel quality information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for measuring channel quality information will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1731885