Dissertation > Excellent graduate degree dissertation topics show

The Method to Correct the Ionospheric Phase Distortion of the Travelling Radio Wave

Author: DingYuan
Tutor: YangQiang
School: Harbin Institute of Technology
Course: Information and Communication Engineering
Keywords: Ionospheric Phase pollution Correction method Characteristic decomposition Phase gradient method
CLC: P352.3
Type: Master's thesis
Year: 2007
Downloads: 199
Quote: 2
Read: Download Dissertation

Abstract


With the rapid development of cross-over study in many related areas of modern communication science , computer science , space science , marine science , earth science disciplines and integrated applications , people can make more use of the propagation characteristics of radio waves in the ionosphere , to complete long-distance communication , over-the-horizon detection, a wide range of navigation activities , ionosphere of human production and life have become increasingly prominent . Meanwhile, due to the complexity of the structure itself in the ionosphere , so that radio wave propagation in the ionosphere by some interference . For example , the phase spectrum pollution broadening a great impact on the detection of the target . Study radio waves in the ionospheric propagation process in order to enhance the adaptability and anti-interference ability of ionospheric propagation environment , pollution by phase correction algorithm has important implications . The work done in this article include the following aspects : 1 . Overview of the ionosphere . Respectively, from the case of the seven aspect of the formation of the ionosphere , the structure of the ionosphere , the Doppler effect of the ionosphere , the factors affecting the ionosphere , the state of the ionosphere , the ionospheric model as well as the ionosphere measurement of ionospheric brief introduction to a more comprehensive understanding of the physical state of the ionosphere and the characteristics , and to lay the foundation for further research . Elaborate ionosphere on radio wave propagation . The object of the research is the propagation of radio waves in the ionosphere , the ionosphere during propagation of radio waves is necessary . First, a brief introduction of radio waves the obliquely incident as well as scattering situation . And then focuses on the radar echo ionospheric effects , including the ionosphere on the radar back to the spectral amplitude of the ionosphere on the radar back the influence of the spectral phase , and the impact of the ionosphere on the high-frequency radar work . Research phase contamination correction algorithm , focusing on one of the characteristics of decomposition and phase gradient method for simulation and discuss . Firstly, the mathematical model of the phase pollution , and then introduced to understand the method of phase pollution using MATLAB simulation experiments using eigenvalue decomposition method and phase gradient method simulated sea clutter sinusoidal signal , the phase signal added to the target information correction , as well as the performance of these two algorithms algorithms analysis .

Related Dissertations

  1. The Reliability Design of Stability Monitoring Unit for Hydro-turbine Generator Sets,TV734
  2. Boundary-layer Correction for the Streamline-traced Busemann Inlet,V211.48
  3. On Traffic Data Fusion and Travel Time Prediction Based on Gradient Calibration Method,TP391.41
  4. Goursat Problems of Euler Equations in Gas Dynamics and Cauchy Problems of Variational Wave Equations,O175.27
  5. Based on UV / VIS absorption principle fiber chemical sensing process monitoring of drug dissolution methodological studies,R927
  6. Ionospheric GPS scintillation and uneven body strength initially forecast,P228.4
  7. Study on the Application of Kinematic Precise Point Positioning by GPS,P228.4
  8. Guangzhou ionospheric scintillation monitoring data analysis and multi-satellite signal blinking monitoring algorithm,P352
  9. Ionospheric clutter detection and pollution assessment study,TN958.93
  10. The Mars space current system distribution characteristics,P185.3
  11. A Study on Processing and Application of GPS Muti-Frequency Observations Data,P228.4
  12. Instantaneous Calcuation of Atmospheric Correction-Terms Between CORS of Network RTK,P228.4
  13. Construction and Precision Analysis of Ionospheric Delay Function Model in Chinese Region,P228.4
  14. High-precision measurement of electrical parameters and harmonic analysis research,TM933.4
  15. Examples of aggressive behavior of different nature attacks on children Disposition,B844.1
  16. The Self-calibration Method of DOA Estimation of the Mutual Coupling Error of Rank-loss for the L-shaped Array,TN820
  17. Initial Investigation of Earth, Io and Titan Magnetosphere,P185
  18. Theory and Method on Real Time Monitoring of Ionospheric Delay Using Ground Based GNSS Data,TN967.1
  19. GNSS Ionospheric Occultation Inversion and Its Application,P352.7
  20. O(h~6) and O(h~8) Correction Method for Eigenvalue Problems of Elliptic Equations,O241.8

CLC: > Astronomy,Earth Sciences > Geophysics > Space Physics > Ionospheric physics > Electromagnetic wave propagation in the ionosphere
© 2012 www.DissertationTopic.Net  Mobile