Methods and apparatus for decoding control signals in dispatch t

Details Methods and apparatus for decoding control signals in dispatch t Methods and apparatus for decoding control signals in dispatch t

1996-01-04

1998-07-21

Elmore, Reba I.

Excavating

371 32, H03M 1300

Patent

active

057843880

ABSTRACT:
A system for decoding encoded data from the control channel of a trunked dispatch system, and for detecting the presence of subaudible handshake data on an assigned voice channel of the trunked dispatch system. The decoder includes a de-interleave, an auto synchronization sequence combiner, and a table lookup error detector to recover the transmitted information and also indicates whether any errors are present in the recovered information. The subaudible handshake detector includes a comparator/limiter, a data sampler, a pattern matcher, and a signal
oise discriminator to indicate the presence of the subaudible handshake on an assigned voice channel of the trunked dispatch system.

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