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Broadband digital receiver and real-time frequency spectrum processing method thereof

A digital receiver and digital mixing technology, applied in electrical components, transmission systems, etc., can solve the problems of narrow real-time spectrum processing bandwidth and low spectral resolution, and achieve the effect of improving FPGA resource utilization.

Inactive Publication Date: 2014-08-06
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of narrow real-time spectrum processing bandwidth and low spectrum resolution of existing digital receivers

Method used

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  • Broadband digital receiver and real-time frequency spectrum processing method thereof
  • Broadband digital receiver and real-time frequency spectrum processing method thereof
  • Broadband digital receiver and real-time frequency spectrum processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Taking the number of receiver channels N=6 as an example, the real-time spectrum processing process of the receiver will be described in detail below.

[0042] The receiver has 6 channels, and the maximum signal bandwidth of each channel is 50Mhz (according to the needs of real-time spectrum analysis, in order to improve the spectrum resolution, other smaller bandwidths can also be selected), the AD sampling rate is selected as 280Mhz, and the signal bandwidth of each channel The center frequency is chosen as 490MHz. Take single-channel processing as an example:

[0043] Configure the clock module to provide the correct frequency working clock for the CIC filter bank and polyphase filter bank.

[0044] For the present invention, the required cosine and sine sample signals for digital mixing are:

[0045] cos ( 2 π 70 280 · n ) ...

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Abstract

The invention belongs to the field of digital signal processing, and particularly relates to a broadband digital receiver. The broadband digital receiver is used for solving the problem that an existing digital receiver is narrow in real-time frequency spectrum processing bandwidth and low in frequency spectrum resolution. The broadband digital receiver comprises an input end and an output end, and further comprises a first filter bank, an analog mixing module, a second filter bank, an analog-digital conversion module, a time-frequency transformation module and a frequency spectrum joint module, wherein the first filter bank is connected with the input end and the analog mixing module, the second filter bank is connected with the analog mixing module and the analog-digital conversion module, the time-frequency transformation module is connected with the analog-digital conversion module and the frequency spectrum joint module, and the output end is connected with the frequency spectrum joint module. The broadband digital receiver is suitable for the fields of electronic reconnaissance receiving, real-time frequency spectrum analysis, radars, communication and the like.

Description

technical field [0001] The invention belongs to the field of digital signal processing, in particular to a real-time frequency spectrum processing method for a wideband digital receiver. Background technique [0002] Faced with an increasingly complex electromagnetic environment, new electronic reconnaissance receiving equipment needs to collect broadband signals and process spectrum in real time. Traditional receivers can no longer meet the needs of current electromagnetic monitoring. High-efficiency digital receivers have the ability of high speed, high sensitivity, large dynamic range, multi-signal parallel processing, and real-time processing of broadband signals, and have become a research hotspot in the field of electromagnetic monitoring. [0003] The digital receiver can adopt software radio technology, and it is easy to complete the signal processing work that the traditional receiver completes in the analog domain in the digital domain. However, the commonly used ...

Claims

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Application Information

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IPC IPC(8): H04B1/16
Inventor 严济鸿张丽郑朋侯硕
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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