Radio receiver and radio receiving method

Details Radio receiver and radio receiving method Radio receiver and radio receiving method

2007-09-18

2007-09-18

Maung, Nay (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S231000, C455S232100

Reexamination Certificate

active

10327104

ABSTRACT:
A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.

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Hiroshi Tanimoto “Mission Impossible? A Review of Mixers for Direct-Conversion Receivers” IEICE Trans. Electron, vol. J84-C, No. 5, May 2001, pp. 337-348.

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