Wireless communication system and intermediate frequency...

Details Wireless communication system and intermediate frequency... Wireless communication system and intermediate frequency...

2008-08-13

2011-10-25

Le, Nhan (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S114300, C455S234100, C375S345000

Reexamination Certificate

active

08045925

ABSTRACT:
An exemplary intermediate frequency (IF) signal loss compensation circuit for an outdoor unit of a communication system includes a sending circuit, a detection circuit, a receiving circuit, and a control circuit. The detection circuit detects in substantially real-time the loss of signal transmitted via a cable from the indoor to the outdoor unit, and transmits loss signal to the control circuit. The control circuit compares the loss signal with a pre-stored signal to determine the loss and then, the control circuit gives loss signals of the sending circuit a variable gain compensation according to the loss. The control circuit also gives loss signals of the receiving circuit a variable gain compensation in advance. The IF signal loss compensation circuit can detect the IF signal loss in substantially real-time, giving the IF signal a variable gain compensation for the loss.

REFERENCES:
patent: 2005/0276359 (2005-12-01), Xiong
patent: 2007/0141982 (2007-06-01), Bargroff et al.
patent: 2008/0207138 (2008-08-01), Aoki et al.
patent: 2009/0121790 (2009-05-01), Brown et al.

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