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The hopping signal reconnaissance digital receiver technology

Author: FengZhanBin
Tutor: WeiPing
School: University of Electronic Science and Technology
Course: Signal and Information Processing
Keywords: Electronic countermeasures Frequency hopping systems Wideband digital channelized receiver Frequency detection FPGA
CLC: TN914.41
Type: Master's thesis
Year: 2007
Downloads: 477
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Electronic countermeasures opposing sides choice of electromagnetic waves in the frequency range of the signal and weaponry to fight for victory in the war of confrontation . Hopping system is developed by the needs of the electronic countermeasures . Hopping communication has become the electronic jamming against the enemy , finding and location , intercept and eavesdropping main means of communication . The main part of the electronic reconnaissance is receiving wideband digital channelized receiver is an electronic countermeasures system is a very promising receiver system , which provides electronic warfare systems , most of the performance parameters of the receiver . This article discusses the main content of the the hopping signal reconnaissance digital receiver technology , the main work of the following aspects : (1) an overview of existing digital reception method , and digital signal reception technology , designed to complete the the hopping signal reconnaissance system the overall program . (2) proposed achieve a DFT fast frequency measurement method , and the use of FPGA . Frequency hopping signal detection experiments prove that the frequency measurement required accuracy in the experiment with a fast , small footprint , and the advantages of a high probability of being correct . ( 3) The experiments show that DFT-based fast frequency measurement algorithm in frequency measurement of individual frequencies , the result will be an error occurs , through theoretical analysis to find the reasons and correct these errors through improved frequency measurement accuracy of these frequencies , the algorithm improves the probability of being correct frequency measurement . (4) the use of FPGA frequency measurement part of the functional modules and the design is complete serial communication , discussion and analysis of design parameters . (5) design based on the MATLAB system operation interface , the DOS command execution , data transmission , index calculation and dynamic presentation . The last experimental results are given and the statistics prove that the design is completed in this article based on FPGA digital channel frequency detection system with frequency measurement speed , high probability of being correct , less resource consumption good performance in the accuracy of the experimental requirements the good frequency hopping signal detection . This article has been improved frequency measurement algorithm process some conclusions that have certain theoretical and practical value in digital channelized receiver .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication systems ( transmission system) > Frequency hopping spread spectrum communication system > Frequency hopping communication
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