Radio systems

Details Radio systems Radio systems

1983-12-01

1986-04-01

Fleming, Michael R.

Excavating

371 35, 375 58, 455 69, H03K 1334, H04B 720

Patent

active

045802629

ABSTRACT:
A radio system employs a method of controlling the transmitted power of a radio signal such that a minimum power level for efficient reception is maintained. Data is simultaneously transmitted between two radio stations using an error correction code. Each block of the code is accompanied by a power bit. The transmitted power bit is set high or low in dependence upon whether the number of errors in a sample of received blocks, as determined by processing of the received code, is equal to, above or below a predetermined threshold value. At the other station the received power bit is directed to a power control device and used to adjust the output power of the transmitter of that station by continuously variable slope delta demodulation.

REFERENCES:
patent: 3646518 (1972-02-01), Weinstein
patent: 4004224 (1977-01-01), Arens et al.
patent: 4110558 (1978-08-01), Kagcyam et al.
patent: 4228538 (1980-10-01), Scharla-Nielsen
patent: 4309771 (1982-01-01), Wilkens
patent: 4340973 (1982-07-01), Umetsu
patent: 4471485 (1984-09-01), Prevot et al.
patent: 4495648 (1985-01-01), Giger
Ericsson Review, vol. 58, No. 3, 1981, pp. 128-133, E. Lundblad "CONTACT RL400--a New Radio Relay Equipment".

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