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Inversion theory and application of the envelope signal time based on the difference frequency technology

Author: WangDuo
Tutor: WangBingZhong
School: University of Electronic Science and Technology
Course: Radio Physics
Keywords: Beat frequency Time reversal Envelope signal Focusing properties
CLC: TN911.7
Type: Master's thesis
Year: 2011
Downloads: 42
Quote: 0
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Abstract


With time reversal is gradually introducing electromagnetic field , electromagnetic time reversal technology due to its unique adaptive space-time focusing properties , especially in the field of communication is the communication of complex distributed environments widespread attention , short-range wireless communications applications an important research direction . This thesis is based on the existing time of electromagnetic wave inversion technique progress and improved technology based on the difference frequency the envelope signal time inversion program , under the premise of the technical program , in -depth exploration of time used in short-range wireless communications system inversion . The entire paper is divided into five chapters are discussed : In the first chapter , the paper first introduces the time reversal overview of the development of the technology , and the envelope signal time inversion introduced the background and application of the technologies used to produce . The second chapter of the envelope signal with the traditional full signal inversion compared , and the envelope signal time inversion technique theoretical derivation . Taking into account the existing I / Q splitter modulation envelope inversion program , given a single envelope time inversion program , and on this basis to perfect the technology based on the difference frequency the envelope signal time inversion . Chapter simulation analysis of the time difference frequency envelope signal inversion program . Circuit and system analysis software ADS , the difference is the frequency envelope signal time inversion program simulation , and the results of time with full signal inversion program . Chapter measured signal inversion and difference frequency envelope inversion program communication experiment . First time inversion scheme of the full signal and envelope signal time inversion scheme were single - pulse Gaussian signal focusing properties of experimental and combined with the custom of the time reversal of electromagnetic waves are observed characteristics of indicators , observational comparison and analysis of the results . Secondly , for this paper, the envelope signal time inversion scheme based on difference frequency technology to transmit real - time text communication experiment , communication quality inspection . Chapter summary of the above work , and directions for future research planning .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Signal processing
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