| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless receiver provided with a correction function for correcting variations in a cut-off frequency of an anti aliasing filter for eliminating an aliasing noise at a pre-stage of an ADC (Analog-Digital Converter) and a channel filter for limiting the band to eliminate the effect of a received signal on adjacent channels particularly with respect to the wireless receiver in a wireless communication system. SOLUTION: A wireless receiving circuit of the wireless receiver wherein an orthogonal demodulator comprising multipliers, an oscillator, and a phase shifter separates a received signal into I and Q phases and thereafter analog filters (anti aliasing filter, channel filter), the ADC next to them, and digital filters next to the ADC apply processing to the signal, includes: a means for directly inputting an output of the oscillator to the analog filters; and a monitor/control section that monitors outputs of the analog filters converted into digital by the ADC and controls parameters such as coefficients of the digital filters depending on a result of the outputs to correct a frequency/phase characteristic of the analog filters. COPYRIGHT: (C)2008,JPO&INPIT
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