Channel selecting system for use in a multi-channel mobile commu

Details Channel selecting system for use in a multi-channel mobile commu Channel selecting system for use in a multi-channel mobile commu

1981-01-26

1982-12-21

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455 33, 455 62, 455 52, H04B 116, H04B 1500

Patent

active

043653472

ABSTRACT:
A channel selecting system for use in a multi-channel mobile communication system. The received field strength associated with each channel is measured sequentially to select a channel in the highest field strength. Within a measurement time span for each channel, time segments in which the field strength is lower than a predetermined level is totalized. When the total reaches either a reference time length which is less than the measurement time span or expiration of the measurement time span, one channel measurement is switched to another.

REFERENCES:
patent: 3913017 (1975-10-01), Imaseki
patent: 3978408 (1976-08-01), Gupta et al.
patent: 4034340 (1977-07-01), Sant'Agostino
patent: 4069455 (1978-01-01), Sherman, Jr.
patent: 4197500 (1980-04-01), Klein et al.
"800 MHz Band Land Mobile Telephone Control System" by N. Yohsikawa et al., Review of the Electrical Communication Laboratories, vol. 25, Nos. 11-12, Nov.-Dec. 1977, pp. 1172-1190.

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