Communication channel accuracy measurement

Details Communication channel accuracy measurement Communication channel accuracy measurement

2005-08-09

2005-08-09

Ton, David (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Transmission facility testing

C714S713000

Reexamination Certificate

active

06928592

ABSTRACT:
This invention relates to the measurement of the accuracy of a communication channel. The invention provides a method and apparatus for determining channel degradation information for a communications channel, in which a known data sequence is generated within a transmitter; a coded data sequence based on the known data sequence is transmitted using the transmission channel; said known data sequence is generated within the receiver; and the known data sequence generated within the receiver is compared with a decoded data sequence based on data received via the channel to provide said channel degradation information;wherein a source encoder in the transmitter has the ability to generate a predetermined output data sequence in response to a predetermined input data sequence; the known data sequence is generated within the transmitter and within the receiver in dependence upon the predetermined output data sequence; and the decoded data sequence is measured prior to source decoding in the receiver.

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patent: 5621769 (1997-04-01), Wan et al.
patent: 5802105 (1998-09-01), Tiedemann, Jr. et al.
patent: 6668014 (2003-12-01), Endres et al.
patent: 6792049 (2004-09-01), Bao et al.
patent: 99/65182 (1999-12-01), None
patent: 00/72453 (2000-11-01), None
“Digital cellular telecommunicatons system (Phase 2+); Test sequences for the Adaptive Multi-Rate (AMR) speech codec,” 3GPP TS 06.74 version 7.1.1 Release 1998, pp. 1-14, ETSI TS 101 713 V7.1.1 (Mar., 2001), XP-002187428.

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