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Parameterized and modularized multi-channel digital down-conversion design platform and parameterized and modularized multi-channel digital down-conversion design method

A digital down-conversion and parameterization technology, which is applied to baseband system components and other directions, can solve the problems of poor versatility and poor flexibility

Inactive Publication Date: 2015-02-18
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor flexibility and poor versatility of the above-mentioned digital down-conversion technology, and provide a digital down-conversion design platform and method with modularization, parameterization, multi-channel, and variable filter order

Method used

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  • Parameterized and modularized multi-channel digital down-conversion design platform and parameterized and modularized multi-channel digital down-conversion design method
  • Parameterized and modularized multi-channel digital down-conversion design platform and parameterized and modularized multi-channel digital down-conversion design method
  • Parameterized and modularized multi-channel digital down-conversion design platform and parameterized and modularized multi-channel digital down-conversion design method

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Embodiment 1

[0057] The invention is a parametric modular multi-channel digital down-conversion design platform, including an analog-to-digital conversion module and an N-channel digital down-conversion module. The frequency conversion module performs digital down-conversion processing and outputs N-channel baseband digital signals; see figure 1 , the parametric modular multi-channel digital down-conversion design platform of the present invention also includes an N-channel analog signal shaping module, a parameter receiving module, an input channel gating module, an N-channel parameter input port, and N-channel analog signals are input to N-channel analog The signal shaping module outputs N shaped analog signals and sends them to the analog-to-digital conversion module. At the same time, the data interface sends the parameters to the parameter receiving module, and the parameter receiving module sends the channel gating command to the input channel gating module, and the input channel Th...

Embodiment 2

[0061] The parameterized modular multi-channel digital down-conversion design platform is the same as that in Embodiment 1.

[0062] The present invention is also a design method of parametric modular multi-channel digital down-conversion, the design method is run on the above-mentioned parametric modular multi-channel digital down-conversion design platform, see figure 1 , the design process includes:

[0063] A. N-channel, that is, the multi-channel analog signal shaping module, performs shaping on N-channel analog signals, and outputs N-shaped analog signals;

[0064] B, parameter receiving module receiving data interface mainly comprises ethernet mouth, PCI mouth, serial port, USB mouth, the parameter that sends and required filter coefficient, can feed back the information of neutron module of the present invention to data interface simultaneously, carry out Interactive processing.

[0065] Its parameters are received, formed and assigned as follows:

[0066] B1, rece...

Embodiment 3

[0091] The parametric modular multi-channel digital down-conversion design platform and the parametric modular multi-channel digital down-conversion design method are the same as those in Embodiment 1-2.

[0092] In order to make the purpose, advantages and technical methods of the present invention clearer, each module in the embodiment of the present invention will be described in detail below on the basis of the modular concept on the programmable logic device Xilinx Virtex5 series FPGA.

[0093] 1. N(N≥1) channel analog signal shaping module. Each channel includes an analog signal shaping circuit, and the analog signal shaping circuit is used to adjust the input analog signals of the N channels and output them to the analog-to-digital conversion module.

[0094] 2. Input channel gating module. The module outputs enable control signals of N channels, which are used to select N mutually independent analog channels to select M channels. The enable control signal is used as ...

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Abstract

The invention provides a parameterized and modularized multi-channel digital down-conversion design platform and a parameterized and modularized multi-channel digital down-conversion design method, belonging to the digital signal processing field. A design platform is a parameterized and modularized multi-channel digital down-conversion design platform, which selects M channels from analog input signals of N channels to perform analog-digital conversion and performs the digital down-conversion treatment to output M paths of baseband digital signals. The invention is also a design method, wherein the design process is as follows: an input analog signal gating performs the analog-digital conversion and then the orthorhombic mixing; order H of a filter and a branch extracting multiple D area analyzed in real time; the signals after performing the orthorhombic mixing are respectively delayed, extracted and buffered; meanwhile, the selected filter coefficients are extracted and rearranged, so that the coefficient vector of every branch is obtained and buffered; the buffered data and coefficient are multiplied and added, and the results are periodically extracted and summed, then the output of the M path is obtained. The parameterized and modularized multi-channel digital down-conversion design platform has the advantages of usability, generality and flexibility; the platform is used for transforming multiple intermediate frequency sampling signals to a baseband signal; and meanwhile, the purpose of reducing the data speed rate is achieved.

Description

technical field [0001] The present invention relates to the technical field of digital signal processing, and mainly relates to the specific realization of polyphase filtering structure, specifically a parametric modular multi-channel digital down-conversion design platform and method, which can realize parameterization, modularization, multi-channel, scalable Design of digital down-conversion with variable filter order. Background technique [0002] The technology of using ASIC to realize digital signal processing has the characteristics of high cost, low reuse rate and poor versatility. With the rapid development of signal processing technology, software radio has become a key technology in the field of signal processing today. The basic idea of ​​software radio is based on a common, standard and modular hardware platform, and realizes various functions through software programming. Therefore, the software function reduces the hardware circuit design with single function...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
Inventor 苏涛陈倩闫海莉杨涛许磊郭文伟
Owner XIDIAN UNIV
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