Method and apparatus for distinguishing control channel from tra

Details Method and apparatus for distinguishing control channel from tra Method and apparatus for distinguishing control channel from tra

1996-08-07

1998-06-23

Bocure, Tesfaldet

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

H04L 2706

Patent

active

057709270

ABSTRACT:
A discriminating circuit stores a flag designating a received radio signal as belonging to a traffic channel, a control channel, or an unidentified channel. If the flag does not indicate the traffic channel, the discriminating circuit decodes the signal and detects errors on the assumption that the signal belongs to the control channel. The detected errors include convolutional code errors, which are detected by re-encoding the decoded signal, as well as errors in other types of codes. If the flag indicates that the channel is unidentified, a counter is incremented according to the paucity or absence of errors. When the counter reaches a threshold value, the flag is set to indicate the control channel.

REFERENCES:
patent: 5199031 (1993-03-01), Dahlin
patent: 5606548 (1997-02-01), Vayrynen et al.

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