Spread-spectrum, frequency-hopping radio telephone system with v

Details Spread-spectrum, frequency-hopping radio telephone system with v Spread-spectrum, frequency-hopping radio telephone system with v

1996-02-26

1997-04-08

Olms, Douglas W.

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370335, 370433, 375202, H04J 400, H04J 1306

Patent

active

056194935

ABSTRACT:
A multiple access communications system reuses a set of N carrier frequencies in adjacent communications sites to provide more than N minimally cross-correlated frequency-hopping communications channels. A first set of communications channels is associated with a first of the communications sites. No two of the channels in the first set employ the same frequency at the same time. A second set of communications channels is associated with a second of the adjacent communications sites. No two of the channels in the second set of channels employ the same one of the N carrier frequencies at the same time. One or more sets of the minimally cross-correlated channels are further defined so that none of the channels in such sets employ the same frequency at the same time as more than a predetermined number of the channels in another of the sets of the minimally cross-correlated frequency-hopping communications channels. The signal activity level of a frequency-hopped transmission is detected on one of the frequencies of the hopping pattern. The transmission is deactivated when the signal is silent. When signal activity resumes, the signal is transmitted with a new hopping sequence.

REFERENCES:
patent: 4554668 (1985-11-01), Deman et al.
patent: 4860359 (1989-08-01), Eicher
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 5239557 (1993-08-01), Dent
patent: 5282222 (1994-01-01), Fattouche
patent: 5408496 (1995-04-01), Ritz et al.

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