H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 5/12 (2006.01)
Patent
CA 2544663
A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.
L'invention concerne un procédé et un appareil d'estimation et de transmission de la qualité d'un canal de communication sans fil entre une unité d'émission/réception sans fil (WTRU) et un noeud B. Un signal modulé est reçu du noeud B sur le canal de communication, et une estimation de canal est exécutée sur le signal modulé afin d'obtenir une estimation de canal. Dans un mode de réalisation, le signal modulé est démodulé en fonction d'une estimation de canal afin d'obtenir un signal démodulé, et une estimation signal-interférence (SIR) basée sur le signal démodulé est obtenue. La qualité du canal de communication est estimée au moins en fonction de l'estimation SIR. Dans un autre mode de réalisation, une estimation SIR basée sur l'estimation de canal est obtenue. La qualité du canal de communication est estimée en fonction de l'estimation SIR et d'informations supplémentaires comprenant au moins des informations de retard, de puissance de transmission et de vitesse de la WTRU.
Li Bin
Pietraski Philip J.
Sternberg Gregory S.
Yang Rui
Interdigital Technology Corporation
Ridout & Maybee Llp
LandOfFree
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