System and method for estimating initial channel quality in...

Pulse or digital communications – Testing

Reexamination Certificate

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C375S346000

Reexamination Certificate

active

10248447

ABSTRACT:
A method of estimating initial channel quality in a receiver when allocated a new channel in order to select an optimal codec mode in a multi-rate service is disclosed. One implementation initially fills the filter state with the first received channel quality measurement. Another embodiment proportionally fills the entire filter state with the calculated channel quality measurements. Yet another embodiment uses the hysteresis and threshold parameters in conjunction with the initial codec mode to calculate an initial fill value for the filter state.

REFERENCES:
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patent: 2002/0174376 (2002-11-01), Classon et al.
patent: 2004/0141551 (2004-07-01), Forbes et al.
patent: WO 99/62213 (1999-12-01), None
“A robust low complexity algorithm for carrier-to-interference ratio estimation in GSM”, Nangia, V.; Nowack, J.M.; IEEE vol. 2, May 2002, pp. 731-735.
“ETSI E N 3 01 7 09, v.7.0.2. Digital cellular telecommunications system (Phase 2+); Link adaptation (GSM 05.09 version 7.0.2 Release 1998)” Dec. 1, 2999 pp. 1-13.
International Search Report, PCT/IB2004/000043, May 28, 2004, Sony Ericsson Mobile Communications AB.
Written Opinion, PCT/IB2004/000043, May 28, 2004, Sony Ericsson Mobile Communications AB.

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