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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

Active Publication Date: 2016-03-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Superheterodyne receiver and receiving method
  • Superheterodyne receiver and receiving method
  • Superheterodyne receiver and receiving method

Examples

Experimental program
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Embodiment Construction

[0076] figure 1Shown is a block diagram of a superheterodyne receiver 100 according to one form of operation. The superheterodyne receiver 100 is used to receive an analog RF signal 102 . The superheterodyne receiver 100 includes a sampling mixer 101 , a discrete-time filter 103 , a discrete-time mixer 109 and an analog amplifier 107 .

[0077] The sampling mixer 101 is used to use a predetermined sampling rate f s for frequency f RF The analog radio frequency signal 102 is sampled to obtain a discrete-time sampled signal 104, and the discrete-time sampled signal 104 is shifted towards the first intermediate frequency |f RF -f LO |(f LO is the local oscillator frequency generated by 106), thus obtaining a predetermined sampling rate f s The intermediate discrete-time signal 108 is sampled.

[0078] The discrete-time filter 103 is used to sample at a predetermined sampling rate f s Discrete-time processing is performed on intermediate discrete-time signal 108 to obtain...

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PUM

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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).

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/00
CPCH04B1/0007H04B1/26
Inventor 马苏德·图希迪安伊曼·麦达迪罗伯特·博丹·斯达世斯基
Owner HUAWEI TECH CO LTD
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