Dissertation > Excellent graduate degree dissertation topics show

Impulse GPR Time-variant Gain Amplification Receiving System Design

Author: GaoYang
Tutor: XuHui
School: Shenyang University of Technology
Course: Measuring Technology and Instruments
Keywords: GPR receiver time-variant gain control FDTD decay curve
CLC: TN958.3
Type: Master's thesis
Year: 2013
Downloads: 43
Quote: 0
Read: Download Dissertation

Abstract


Ground penetrating radar (GPR) is a relatively new geophysical detection method.GPR use broadband electromagnetic wave in the form of pulse to detect medium internalobjects or underground structure. It has a very wide range of applications in thegeophysical detection aspects. So it needs high resolution and efficiency. Research forGPR has very important significance. GPR receiver design directly affects the performanceof the machine. The time-varying gain circuit of receiving part can greatly increase thereceiver sensitivity and dynamic range. General literature rarely mentioned time-variantgain the gain curve get method. So obtain gain curve and research for time-varying gainGPR receiving system are of great value.The main work of this project is to design a variable gain amplifier based impulseground penetrating radar receiver system. The entire impulse ground penetrating radarreceiving system by the high-frequency part of the microwave filter, low-noise amplifiercircuit and equivalent sampling circuit, time-varying gain circuit IF part and FPGA controlmodule circuit composed. High-frequency impulse ground penetrating radar echo signalsthrough the filter and low-noise amplifier circuit is filtered and amplified, and then gothrough the equivalent sample circuit down converting, Echo signal is stretched amplifiedthrough a variable gain control module is real-time zoom and then output. The entiresystem is completed under the control of the FPGA.This topic obtains the time-varying gain curve by using the FDTD method.Completed the design and simulation of the high-frequency part. The software ofsimulation is Agilent ADS. Completed the IF equivalent sampling part of the design andsimulation. A variable gain control module is produced. Preparation of the FPGA controlprocedures for each module.This paper gets the decay curve of the electromagnetic wave propagation in lossydielectric. when medium relative dielectric constant is8and conductivity is0.04S/m andrelative permeability is1and magnetic resistance rate is0Ω/m. The excitation source is Gaussian pulse. Verify the exponential decay of electromagnetic waves in lossy media.Design microwave filter center frequency of100MHz. Meet portion20dB stop-bandattenuation requirement. Design equivalent sampling circuit simulation to achieve theeffect of high frequency echo cycle stretching1,000times. The design of time varying gaincontrol module converts the analog echo signals in real time according to the gain curve.

Related Dissertations

  1. High Dynamic Carrier Tracking Algorithm of Software GNSS Receiver,P228.4
  2. Research and Realization on Synchronization Technology of High Sensitivity GNSS Software Receiver,P228.4
  3. Research on Techniques of Information Acquisition and Location in Pavement Roughness Inspection,U416.2
  4. Study on Channel Allocation of Multi-Channel MAC Protocol in Ad-Hoc Network,TN929.5
  5. The Research and Realization of Medium Wave Receiver Based on Software Defined Radio,TN851
  6. Study on Estimation of Two Dimensional Direction of Arrival Using a DBF Receiver,TN851
  7. Research on 8 Mm-Band Direct Detection Radiometer,TN850.7
  8. Impact of Serum Progesterone Level on Treatment Outcome and Its Appropriate Threshold Value during Late Follicular Phase in IVF-ET Cycle,R714.8
  9. The Design and Implementation of a Miniature Polluting Gas Monitoring System,TP277
  10. GPU accelerated computing speed based on FDTD and simulation studies,TN011
  11. Applied Research of Ground Penetrating Radar in Tunnel Geological Prediction,U452.11
  12. Design of Communication System of Meso-scale Auto Weather Station,P415.12
  13. Comparison of the Different Diagnostic Criteria for the Metabolic Syndrome among University Staff in Shenyang,R589
  14. Design and Implementation of FPGA and ARM Based GPS Signal Processing Platform,P228.4
  15. ARM-based GPS positioning algorithm research and implementation,P228.4
  16. Based on GPR Concrete Pavement Void Detection Technology,U416.216
  17. GPS Receiver for DSP-based missile carrier,P228.4
  18. Two-dimensional Finite Element Forward Simulation for Ground Penetrating Radar Model,P631.5
  19. The Research on Automatic Thickness Analysis of Highway Pavement Based on GPR,TN959.71
  20. Research and Implement of Automatic Detection Algorithm and Software Implement for the Thickness of Highway Pavement Based on GPR,U416.06
  21. The Research and Implementation of Detecting System in Concrete Beam of Bridges,TP274

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub- > Pulse compression and pulse coded radar
© 2012 www.DissertationTopic.Net  Mobile