Radio scan method with spatial channel marking

Details Radio scan method with spatial channel marking Radio scan method with spatial channel marking

1997-09-29

1999-01-26

To, Doris H.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551661, 4551861, 4552262, 455516, 4551741, H04B 118

Patent

active

058647520

ABSTRACT:
A method used with spatial channel marking in a radio scanning technique that extends the conventional methods of channel marking to include information about the source of the signal. This information is stored on a per-channel basis whenever a mark is placed on a channel. On successive visits to a marked channel, a determination is made whether the source of the signal has changed. If a change is detected, the channel is immediately unmarked and a decode begins, even through a carrier may still be present. This provides for situations when an associated group member using a two-way radio begins transmitting while a radio of another group is transmitting and keeping the channel marked. An unsuccessful decode will result in re-marking and an update of the source information.

REFERENCES:
patent: 4513443 (1985-04-01), Louttit
patent: 5199109 (1993-03-01), Baker

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