Radio receiving apparatus

Details Radio receiving apparatus Radio receiving apparatus

2006-06-15

2011-10-25

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S316000, C375S324000

Reexamination Certificate

active

08045650

ABSTRACT:
A radio receiving apparatus capable of making compensation for both amplitude variations and phase variations and of suppressing image interference in a short period of time is provided. A correction value calculation section combines a signal, obtained by multiplying a first digital signal by an amplitude correction candidate value and rotating the phase of the first digital signal, with a signal obtained by multiplying a second digital signal by a multiplicative inverse of the amplitude correction candidate value and performing, for the second digital signal, phase rotation which is in a quadrature relationship to phase rotation performed for the first digital signal, so as to obtain a first combined signal, obtain an inflection point of the first combined signal, and input, to a demodulation section, the amplitude correction candidate value and a phase correction candidate value, which correspond to the inflection point, as an amplitude correction value and a phase correction value, respectively. The demodulation section makes compensation for the amplitudes and the phases and suppresses image interference, based on the amplitude correction value and the phase correction value.

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International Search Report issued Aug. 15, 2006 in the International (PCT) Application of which the present application is the U.S. National Stage.

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