Dissertation > Excellent graduate degree dissertation topics show

PCM/FM Telemetry Receiver Sestem

Author: ZhaoZuoZuo
Tutor: LuHuiBin
School: Yanshan University
Course: Circuits and Systems
Keywords: Telemetry PCM/FM Cordic Differential Demodulation Envelope Detector Digital Demodulation
CLC: TP87
Type: Master's thesis
Year: 2012
Downloads: 157
Quote: 0
Read: Download Dissertation

Abstract


Telemetry system mainly uses the PCM/FM system, the system uses the presettingfilter to limits the signal band, concentration of useful emission power, and uses limitingfrequency discriminator of non-coherent detection method, applied to the fading channelthat difficult to establish the phase-coherent detection. This paper analyzed andsummarized on the basis of the development process of the PCM/FM system, we researchon the following aspects in this dissertation.Firstly, we researched the demodulation technology in PCM/FM system, analyzed thecause that analog phase-locked frequency modulation circuit to achieve low-frequencyresponse characteristics of PCM/FM system is not ideal, and characteristics of analogcircuits is very difficult to debug, and the system is not flexible enough. And then useddigital demodulation method for remote telemetry receiver system, we summarized somebasically demodulation theory and improved some demodulation methods.Secondly, we focused on two demodulation technologies that were the linear FM ztransformation algorithm and envelope detector algorithm. linear FM z transformalgorithms, when the signal to noise ratio is smaller, using the method that improving thelocalization spectral resolution, can got a more accurate peak, and got adaptive selectionalgorithm of results. Envelope detection method is derivation to the constant amplitudeFM wave, which allows the variation of the modulation signal to be reflected in theenvelope.Thirdly, we in-depth researched cordic demodulation algorithm, when input signal isquartered IF signal and the corresponding clock, so the output is the instantaneous phasecorresponding to the input transient signal., but when it is no delay of the channel, theanti-noise performance less than coherent demodulation. On this basis, we put forward animproved cordic differential frequency discriminator demodulation algorithm, after obtainthe instantaneous phase, made the first order difference in the digital domain to completethe signal frequency discrimination, ensure the signal’s anti-dry performance at thechannel without delay. Through the simulation result show that the algorithm reasonable. Finally, we designed working diagram of telemetry remote control receiver system,analyzed the demodulation performance of the above demodulation algorithm. And weanalog IF signal to numerical simulate, analyzed the bit error rate and the demodulateddata, through the experimental data could know the cordic differential frequencydiscrimination is the best demodulation algorithm.

Related Dissertations

  1. Design and Realization of Automatic Observation System for Modern Reservoir,TV697.2
  2. Design and implementation of hydrological telemetry system based on mobile communication network,TP311.52
  3. Research on Implantable Radio-Telemetry System for Monitoring Animal Physiological Parameters Based on Wireless Power Transmission Technology,R197.39
  4. The Design of Implantable Wireless Telemetry System,R318.6
  5. The target dynamic simulator design and Implementation,V416.8
  6. Design and Application of the Buoy Telemetry and Telecontrol System of the South China Sea,TP872
  7. Design and Application Agree with Low-rate Data of High-speed All-digital QPSK Demodulator,TN763
  8. Microfluidic gyroscope drive and detection technology,V241.5
  9. Research on Remote Wirless System of Telemetering and Remote Control,TP872
  10. FPGA Implementation of QAM Modulation and Demodulation in Telemetry Technology,TP873
  11. The Research on Spread Spectrum Telemetry Intermediate Receiver,TN914.42
  12. Research on the Experimental System for the Physical Simulation Testing of the Large Scale Model at Sea,U661.74
  13. Design of Pharos Remote Terminal Based on Embedded System,TP873
  14. Study and Implementation of Satellite Test Language and Its Executing Platform,V554.3
  15. Development of Automatic Ultrasonic Inspection Hardware Systems Based on ARM Platform,TH878.2
  16. Research on Transmission Characteristics and High Rate Transmission Technology of Single-Core Logging Cable,TN919.3
  17. City Lighting Wirreless Control System Based on GPRS,TN929.5
  18. Development of Wireless Telemetric 48-channel High Resolution Shallow Digital Seismograph,P631.43
  19. Construction of the Drilling Fluid Continuous Pressure Wave QPSK Signals and Its Transmission Characteristics Study in the Directional Wellbore,TE254.1
  20. Vector signal analyzer on the radio tests applied research,TM935
  21. Based on the ultrasonic resonator hydrogen detection system research and design,TP274

CLC: > Industrial Technology > Automation technology,computer technology > Remote technology > Remote system
© 2012 www.DissertationTopic.Net  Mobile