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A Digital Down-conversion Method with Parallel Structure

A technology of digital down-conversion and functions, which is applied in the field of digital down-conversion, can solve the problems of channelized receivers such as cross-channel and signal leakage, and achieve the effects of reducing hardware resource consumption, avoiding cross-channel problems, and reducing the number of filters

Active Publication Date: 2022-01-18
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • 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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  • A Digital Down-conversion Method with Parallel Structure
  • A Digital Down-conversion Method with Parallel Structure
  • A Digital Down-conversion Method with Parallel Structure

Examples

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Embodiment Construction

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

[0067] In the present invention, the digital intermediate frequency signal sampled by the ADC is used as the input signal, and the input signal is firstly processed into multiphase, and then the parallel frequency mixing operation is performed, and the result of the frequency mixing calculation is precoded, and finally the multiphase data is sent to the parallel low-pass filter 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:

[007...

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Abstract

The invention provides a digital down-conversion method with a parallel structure. The input signal is multi-phase processed to generate a multi-phase local oscillator. After multi-phase frequency mixing, a preset matrix is ​​constructed. By designing a prototype low-pass filter, the prototype low-pass The filter coefficients are polyphased, and then the mixed frequency data is pre-coded, and a parallel filter bank is constructed to realize parallel filtering. The invention overcomes the problem of low data throughput rate of the serial structure digital down converter, realizes the receiving and processing of high-speed sampling signals, meets the requirements of broadband signal processing, can flexibly set the frequency of frequency conversion and the cut-off frequency of low-pass filtering, and realizes signal processing. It can directly receive and process the full bandwidth of the channelized receiver, thereby avoiding the cross-channel problem of the channelized receiver. By adding the preset matrix, it can merge and input similar items, thereby greatly reducing the number of filters in the parallel structure, reducing hardware resource consumption, and facilitating FPGA implementation.

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 Patents(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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