Repeater

Details Repeater Repeater

1994-06-22

1998-12-22

Vo, Don N.

Pulse or digital communications

Repeaters

375371, 455 23, H04B 336

Patent

active

058526293

ABSTRACT:
A repeater wherein quadrature detection is performed using signal form a local oscillator nonsynchronized to a received carrier, and a baseband signal is reproduced, with the frequency and phase difference between the received carrier and the local oscillator being compensated for by means of a feedback loop consisting of a phase rotator, a controller, a loop filer, and a digital VCO. The reproduced baseband signal is quadratue-modulated with the signal from the local oscillator. The local oscillator necessary for the operation of the repeater is shared between the demodulator and the modulator; reductions in the size and cost of the repeater can be achieved.

REFERENCES:
patent: 4475243 (1984-10-01), Batlivala et al.
patent: 4493090 (1985-01-01), Gordon
patent: 4701935 (1987-10-01), Namiki
patent: 5301210 (1994-04-01), Vandamme et al.
patent: 5400366 (1995-03-01), Iwamatsu
patent: 5440587 (1995-08-01), Ishikawa et al.

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