Method of establishing a radio link in one of a plurality of channels between two radio units
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United States of America Patent
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Feb 19, 1991
Grant Date -
N/A
app pub date -
Jul 31, 1989
filing date -
Sep 2, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The method comprises transmitting an initiating signal in the form of a bit pattern as a continuous burst from one radio unit to the other. The pattern incorporates a preamble pattern and a security code having a plurality of bit sequences. Each sequence is transmitted a number of times. The received security code is compared with stored codes in the other unit, and if a matching pair is identified a response signal is transmitted from the other unit to said one unit. The response signal incorporates the preamble pattern for establishing synchronization between the radio units.
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