Dissertation > Excellent graduate degree dissertation topics show

Research on Key Techniques of PCSS Complex System

Author: ZhaoZuo
Tutor: SunZhiGuo
School: Harbin Engineering University
Course: Communication and Information System
Keywords: Parallel Combinatory Spread Spectrum Communication ranging composite system Non- equiprobable threshold Circular correlation detection
CLC: TN914.42
Type: Master's thesis
Year: 2009
Downloads: 22
Quote: 3
Read: Download Dissertation

Abstract


Information transfer and communication terminal positioning radio system's two main business, generally by the communication system and ranging systems independently. However, in some special applications, the need for a communication system with simultaneous information transfer and ranging functions, respectively by a separate communication system and a ranging system and system electromagnetic environment and the complexity of the equipment will cause the information transmission and ranging tasks . Therefore, there is a need to be able to simultaneously completed communications and positioning (DIST) tasks of the wireless communication system, i.e. communication ranging composite system. Has many technical advantages in terms of probability of intercept, power spectral density, range resolution, spread spectrum communication system is widely used in military communications, business communications and communication terminal positioning occasions. Ranging complex system based on direct sequence spread spectrum technology and soft spread spectrum technology, communication, information transfer and ranging tasks at the same time, but the two composite systems ranging performance and communication efficiency contradictions. Under the premise of ensuring ranging accuracy ranging range, in order to further improve the communication efficiency, the paper proposes a mathematical model of the vector-based system based on the parallel combination of spread spectrum technology, improved communication ranging composite system is derived, and the composite the key technologies of the system were analyzed. In order to improve the performance of the composite system of judgment for the parallel combination of spread spectrum signal special structural features, analyzed and summarized the symbol of the number of states of the parallel combination of spread spectrum signal, the mathematical laws of the state of the symbol, derived parallel combination of spread spectrum signal code meta-state non-probability characteristics. On this basis, drawing on the probability symbol best judgment theory, combined with the parallel combination of spread spectrum signal characteristics of non-probability, to derive the optimum decision threshold applies to the parallel combination of spread spectrum signal. In order to improve the signal detection performance of the composite system in a complex electromagnetic environment, reduce the impact of noise on the detection performance, derivation based the correlation operation detection algorithm based on the use of the parallel combination of spread spectrum signal and noise circulating characteristics differences the parallel combination of spread spectrum signal detection algorithm based on cyclic derived a mathematical model of the algorithm; analysis and detection algorithm to suppress noise performance. Theoretical analysis and simulation results demonstrate the effectiveness of the parallel combination of spread spectrum signal detection algorithm based on loop detection noise suppression.

Related Dissertations

  1. Research on Modulation Technologies in UWB-PCSS Communication System,TN925
  2. Spread spectrum technology in digital watermarking,TP309
  3. Parallel Combinatory Spread Spectrum Communication System receives key technology research,TN914.42
  4. Research on Receiving Technologies of PCSS System Based on Cyclic Spectrum Correlation,TN914.42
  5. The Research of Key Technology of Parallel Combinatory Spread Spectrum Communication System,TN914.4
  6. Research on System Modes and Channel Estimation Technologies of PCSS,TN914.42
  7. Research on Parallel Combinatory Spread Spectrum Underwater Acoustic Communication,TN914.42
  8. Research on Key Technologies of HF Parallel Combinatory Spread Spectrum Communication System,TN914.42
  9. Research and Hardware Simulation of Multiuser Spread Spectrum Code Acquisition Based on FPGA,TN914.42
  10. Direct Sequence Spread Spectrum the DMF capture technology simulation design,TN914.42
  11. Detection and Parameters Estimation of Direct Sequence Spread Spectrum Communication Signals in Non-cooperative Context,TN914.42
  12. Research on Receiving Technologies of PCSS System Based on Cyclic Spectrum Correlation,TN914.42
  13. Research on Key Technologies of HF Parallel Combinatory Spread Spectrum Communication System,TN914.42
  14. Research on Parallel Combinatory Spread Spectrum Underwater Acoustic Communication,TN914.42
  15. RF Front-End Design and Implementation in Wireless Spread Spectrum Communication System,TN914.42
  16. A Study on the Design Methods of Spread Spectrum Sequence in Chaotic Communication and the Carrier Recovery under Doppler Shift,TN914.42
  17. Based on two-dimensional spreading LPI design and implementation of wireless communication devices,TN914.42
  18. Sequence Spread Spectrum DSSS signal parameters and Blind Estimation Algorithm,TN914.42
  19. The Design and Implementation of Digital DS Spread Spectrum Receiver in Burst Communication,TN914.42
  20. The Design and Implementation of Static Oil Well Measuring Based on Spread Spectrum Technology,TN914.42

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication systems ( transmission system) > Frequency hopping spread spectrum communication system > Spread spectrum communication
© 2012 www.DissertationTopic.Net  Mobile