Superheterodyne receiver

A super-heterodyne, receiver technology, applied in electrical components, transmission systems, etc., to reduce power consumption, improve dynamic range, and save power

Active Publication Date: 2014-05-28
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
  • Superheterodyne receiver
  • Superheterodyne receiver

Examples

Experimental program
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Embodiment Construction

[0076] figure 1 Shown 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 obtai...

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Abstract

The invention relates to a superheterodyne receiver (100), comprising: a sampling mixer (101) being configured to sample an analogue radio frequency signal (102) using a predetermined sampling rate (fs) to obtain a discrete-time sampled signal (104), and to shift the discrete-time sampled signal (104) towards a first intermediate frequency (|fRF-fLO|) to obtain an intermediate discrete-time signal (108) sampled at the predetermined sampling rate (fs); a discrete-time filter (103) being configured to filter the intermediate discrete-time signal (108) at the predetermined sampling rate (fs) to obtain a filtered signal (130); and a discrete-time mixer (109) being configured to shift the 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 Applications(China)
IPC IPC(8): H04B1/00
CPCH04B1/26H04B1/0007
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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