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Single-path quadrature mixing wireless receiver

A technology of quadrature mixing and branches, applied in the field of quadrature mixing wireless receivers

Inactive Publication Date: 2012-05-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the design requirements cannot be met through the above measures, some feedback control circuits for error correction should be added if necessary

Method used

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  • Single-path quadrature mixing wireless receiver
  • Single-path quadrature mixing wireless receiver
  • Single-path quadrature mixing wireless receiver

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Embodiment Construction

[0022] The principle block diagram of the single-branch quadrature mixing receiver proposed by the present invention is as follows: figure 1 As shown, it consists of low-noise amplifier, mixer, definite integrator, analog-to-digital converter, digital signal processor, quadrature local oscillator generator and clock generator.

[0023] Wherein the input of the low noise amplifier is connected with the antenna, and the output of the low noise amplifier is connected with an input end of the mixer;

[0024] The other input terminal of the mixer is connected with the output of the quadrature local oscillator generator, and the output of the mixer is connected with the integral input terminal of the definite integrator;

[0025] The other input terminal of the definite integrator is connected with the second clock output 2, and the output of the definite integrator is connected with the input of the analog-to-digital converter;

[0026] The other input terminal of the analog-to-di...

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Abstract

The invention relates to a wireless single-branch frequency-mixing quadrature receiver, which solves the branch matching problem and the problem that both power consumption and area are larger in a traditional dual-branch frequency-mixing quadrature receiver. The provided wireless single-branch frequency-mixing quadrature receiver comprises a low-noise amplifier, a frequency mixer, a definite integrator, an analog-to-digital converter, a digital signal processor, a quadrature local oscillation generator and a clock generator, and is characterized in that the quadrature local oscillation generator alternately generates a sinusoidal local oscillation signal, of which the initial phase switches over between zero degree and 90 degrees continuously; through a time division multiplexing manner,one branch is utilized to realize the quadrature frequency-mixing; so that the branch matching problem of the frequency-mixing quadrature receiver is avoided, one branch is omitted, the power consumption is reduced, the area is reduced, and a new designing scheme is provided to the design of a low power consumption wireless receiver.

Description

technical field [0001] The invention relates to a quadrature mixing wireless receiver, which belongs to the technical field of wireless communication. Background technique [0002] The traditional superheterodyne wireless receiver has the advantages of high sensitivity, good selectivity, and flexible frequency and gain planning, and is widely used in discrete component receivers. However, since this structure requires high quality factor (hereinafter referred to as Q value) reactive components to suppress image frequency interference, and high Q value reactive components are difficult to achieve in modern radio frequency complementary metal oxide (hereinafter referred to as RF CMOS) technology, so in order to improve integration degree, the quadrature mixing structure is widely used. The quadrature mixing receiver uses two branches for frequency mixing, and uses the characteristics of the image frequency interference signals in the two branches to be equal in magnitude and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04L27/00
Inventor 李金城彭琼刘莹
Owner BEIJING JIAOTONG UNIV