Digital down-conversion method of parallel structure

A digital down-conversion and frequency mixing technology, applied in the field of digital down-conversion, can solve the problems of channelized receivers cross-channel and signal leakage, and achieve the effect of avoiding cross-channel, meeting the needs of broadband signal processing, and reducing the number of filters

Active Publication Date: 2020-10-16
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Channelized receivers can achieve high data throughput, but channelized receivers have cross-channel problems
If the receiver has a cross-channel phenomenon, it will cause signal leakage, and the post-processing must add a comprehensive filter bank module to restore the signal

Method used

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  • Digital down-conversion method of parallel structure
  • Digital down-conversion method of parallel structure
  • Digital down-conversion method of parallel structure

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Embodiment Construction

[0066] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0067] The present invention takes the digital intermediate frequency signal sampled by the ADC as the input signal, first performs multiphase processing on the input signal, then performs parallel frequency mixing operation, performs precoding processing on the mixed frequency calculation result, and finally sends the multiphase data into parallel low-pass filtering The device realizes the digital down-conversion processing process of the complete parallel structure. The parallel structure digital down-conversion processing flow is as follows: figure 1 shown.

[0068] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0069] The realization steps of the inventive method are as follows:

[0070] 1) Multi...

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Abstract

The invention provides a digital down-conversion method of a parallel structure. The method comprises the following steps: carrying out multiphase processing on an input signal, generating a multiphase local oscillator, carrying out multiphase mixing, constructing a preset matrix, designing a prototype low-pass filter, carrying out multiphase processing on coefficients of the prototype low-pass filter, carrying out mixing data precoding, and constructing a parallel filter bank, thereby realizing parallel filtering. According to the method, the problem of low data throughput rate of a serial structure digital down converter is overcome; high-speed sampling signal receiving processing is realized; the requirements of broadband signal processing are met; the frequency of frequency conversionand the cut-off frequency of low-pass filtering can be flexibly set. According to the method, full-bandwidth direct receiving processing of signals is realized, so that a cross-channel problem of a channelized receiver is avoided, merging input of similar items is realized by adding a preset matrix, the number of filters in a parallel structure is greatly reduced, hardware resource consumption isreduced, and FPGA realization is facilitated.

Description

technical field [0001] The invention relates to the technical field of wireless communication, and proposes a digital down-conversion method, which has higher data throughput rate, lower hardware implementation and low complexity, and is suitable for receiving and processing broadband signals. Background technique [0002] The basic idea of ​​software radio is to build a common, standardized hardware platform, and various radio functions are realized through software programming. Software radio emphasizes the openness and comprehensive programmability of the architecture, and can flexibly change the hardware configuration through software to realize various new functional requirements. At the same time, the software radio adopts a standard and advanced open bus architecture, which is conducive to hardware expansion and upgrading. Because software radio technology has many excellent characteristics, it is more and more widely used in the radio field. In the current software...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16H04B1/00H03D7/16
CPCH04B1/16H04B1/0096H03D7/16
Inventor 黄刚张萌布刚刚杨康
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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