Superheterodyne receiver and receiving method

A super-heterodyne, receiver technology, applied in electrical components, transmission systems, etc., to save power, realize charge sharing, and reduce power consumption
CN103828244BActive Publication Date: 2016-03-02HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2016-03-02

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Abstract

The invention relates to a superheterodyne receiver (100) comprising: a sampling mixer (101) for sampling an analog radio frequency signal using a predetermined sampling rate (fs) (102) Sampling to obtain a discrete-time sampled signal (104) for shifting said discrete-time sampled signal (104) towards a first intermediate frequency (|fRF-fLO|), thereby obtaining said predetermined sampling rate ( fs) the sampled intermediate discrete-time signal (108); a discrete-time filter (103) for filtering said intermediate discrete-time signal (108) at said predetermined sampling rate (fs) to obtain filtered signal (130); and a discrete time mixer (109) for shifting said filtered signal (130) towards a second intermediate frequency (fIF).
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Description

technical field

[0001] The invention relates to a superheterodyne receiver and a superheterodyne receiving method, in particular to a superheterodyne receiving method for receiving analog radio frequency signals. Background technique

[0002] A receiver is an electronic circuit that receives a high frequency RF signal and downconverts the signal to baseband for further processing and demodulation. These receivers typically amplify the weak desired RF signal and filter out unwanted nearby and surrounding blocking signals. A receiver can usually be tuned to receive a particular channel in a frequency band by changing the LO frequency of the receiver's local oscillator.

[0003] A multiband receiver is capable of receiving signals from two or more different frequency bands at different frequencies. Since these frequency bands can be far apart from each other, multiband receivers should be tunable or programmable to cover all desired frequency bands.

[0004] A multi-standard...

Claims

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