Radio receiver
AssigneePanasonic Corporation
InventorsKatsuaki Abe, Akihiko Matsuoka, Kentaro Miyano
Life of this patent
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Abstract
A radio receiver including a reception processing system that uses discrete-time frequency conversion to acquire a signal having a sampling rate corresponding to a local frequency, wherein the reception characteristic is improved when the reception processing system is applied to a system having a wide reception channel band. The radio receiver comprises an A/D converting part that quantizes a discrete-time analog signal to a digital value to output a received digital signal; a channel selection filtering part that uses a tap coefficient value to perform a digital filtering process of the received digital signal; and a frequency response characteristic correcting part that generates the tap coefficient in accordance with the sampling rate.
Claims8
A radio receiver that receives a signal having one channel frequency among a plurality of channel frequencies by switching a local frequency signal to match the one channel frequency, the radio receiver comprising:
- a discrete time frequency converting section that outputs a discrete time analog signal of a sampling rate to match a first local frequency of the local frequency signal, the discrete time analog signal being generated by sampling the received signal at discrete times using the local frequency signal to match the one channel frequency of the received signal;
- an analog-to-digital converting section that quantizes the discrete time analog signal into a digital value to provide a digital signal based on the digital value;
- a digital filtering section;
- and
- a frequency response characteristic correcting section that generates a tap coefficient value to match the sampling rate and outputs the tap coefficient value to the digital filtering section, wherein:
- the digital filtering section performs a digital filtering process on the digital signal using the tap coefficient value to provide a digitally filtered signal and outputs the digitally filtered signal to a demodulating processing section that is located in a subsequent stage of the digital filtering section.
Dependencies are inferred from the claim text.