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A software radio receiver radio frequency system

A technology of software radio and radio frequency system, applied in the direction of transmission system, electrical components, etc., can solve the problem of incompatibility of air interfaces of different standards

Active Publication Date: 2017-11-10
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies, the present invention discloses a software radio receiver radio frequency system, which realizes the access of radio frequency signals in the range of 100MHz-3GHz, and solves the problem of incompatibility of air interfaces of different standards

Method used

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  • A software radio receiver radio frequency system
  • A software radio receiver radio frequency system
  • A software radio receiver radio frequency system

Examples

Experimental program
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Effect test

Embodiment 1

[0084] Embodiment 1, the system receives air CDMA downlink signal, its frequency domain waveform is as follows Figure 4 As shown, the CDMA downlink signal frequency band ranges from 870MHz to 880MHz, and this frequency band is within the working frequency range of the low-frequency path. The first-stage single-pole double-throw switch 100 connects the antenna and the low-frequency path. The noise amplifier 120 amplifies, and the amplified signal is filtered by an ultra-wideband microstrip low-pass filter 121, and then sent to the first-stage mixer 122 for up-conversion, and the first-stage mixer 122 converts the CDMA downlink signal The center frequency is up-converted from 875MHz to 2595MHz, and its frequency domain waveform is as follows Figure 5 As shown, the up-converted signal is sent to the first-stage narrow-band surface acoustic filter 123 for narrow-band filtering to extract the useful signal, and then the useful signal is connected to the second-stage variable-gain...

Embodiment 2

[0085] Embodiment 2, the system receives air TD-LTE signal, its frequency domain waveform is as follows Figure 9As shown, the frequency range of the TD-LTE signal received in this example is 2575MHz-2595MHz, and this frequency band is within the working frequency range of the high-frequency path. After the frequency path, it is amplified by the first-stage low-noise amplifier 110, and the amplified signal is filtered by the ultra-wideband microstrip line band-pass filter 111, and then sent to the first-stage mixer 112 for down-conversion, and the first-stage mixer The frequency converter 112 down-converts the central frequency of the TD-LTE signal from 2585MHz to a frequency of 830MHz, and its frequency domain waveform is as follows Figure 10 As shown, the down-converted signal is sent to the first-stage narrow-band surface acoustic filter 113 for narrow-band filtering to extract the useful signal, and then the useful signal is connected to the second-stage variable-gain low...

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Abstract

The invention discloses a software radio receiver radio frequency system, which includes a receiving link, a control module, a clock management module and a high-speed intermediate interface; wherein the receiving link adopts an ultra-wideband microstrip line filter cascaded with two stages of frequency mixing Realize the access of radio frequency signals in the range of 100MHz-3GHz; the clock management module is used to generate various clocks required by the system; the control module is used to realize the software switching of different radio frequency signal access; the high-speed intermediate interface is used to connect The digital signal after A / D sampling is transmitted to the IF receiver. The beneficial effects of the invention are: a complete set of software radio radio frequency solution is proposed, which can realize the access of radio frequency signals in the range of 100MHz-3GHz, and solve the problem of incompatibility of air interfaces of different standards.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a complete radio frequency solution for a software radio receiver. Background technique [0002] With the rapid development of science and technology, wireless communication technology has developed rapidly, various communication standards emerge in an endless stream, consumers have more and more stringent requirements for electronic equipment, and the demand for electronic equipment compatible with multiple standards is increasing. In order to solve the problem of communication compatibility between electronic devices of different standards, the idea of ​​software radio came into being. [0003] The research on software radio began in the 1990s. The original purpose was to solve the problems of various types of radio stations in the US military, single functions, and difficult maintenance, and to realize the interconnection and intercommunication betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04B1/10H04B1/00
Inventor 田增山王福江周牧杨进超李博雅刘恒
Owner CHONGQING UNIV OF POSTS & TELECOMM