Dissertation > Excellent graduate degree dissertation topics show

Design and Implementation of the Arbitrary Waveform Generator Hardware System Based on FPGA

Author: DengYuePing
Tutor: XiaoTieJun
School: Jiangsu University
Course: Computer System Architecture
Keywords: Arbitrary waveform generator DDS FPGA signal modulation SOPC instruments
CLC: TN741
Type: Master's thesis
Year: 2010
Downloads: 536
Quote: 0
Read: Download Dissertation

Abstract


Signal generator is one of the general instruments that widely used in modern testing field, which broadly used in electronic circuits, automatic control and scientific experiment, etc. Along with the rapid development of current electronic technology, the kind of device under test is more and more abundant, excitation signal required by test is more and more complicated, so the traditional signal generators can not satisfy the requirements of these tests. The emergence of arbitrary waveform generator provides a new solution for modern electronic measurement. It can not only generate common standard waveforms, but also utilize the microprocessor and waveform editing software to generation arbitrary waveform signals required by system test. Its performance is obviously superior to the traditional signal generator, which can well meet the needs of modern electronic measurement. It represents development direction of the signal source.The rapid development of arbitrary waveform generator in modern electronic measurement field, the key is due to the proposal of direct digital frequency synthesis (DDS) technique. Direct digital frequency synthesis technology is an all-digital frequency synthesis technology proposed in the 1970s, which has such good characteristics:fast frequency conversion, high frequency resolution, low phase noise, variable frequency phase continuous, etc, and provides a good technical means for generating arbitrary waveform through the look-up table. In recent years, with the rapid development of modern electronic technology and VLSI technology, field programmable gates array (FPGA) resource capacity, working frequency and integration have been greatly raised, which provides favorable conditions for the realization of DDS circuit. It has the very good design flexibility through FPGA programming custom DDS circuit required by the system, not only reduces cost, but also improves the performance of arbitrary waveform generator, which is the main content of this research.This paper, based on the basic principle of DDS, systematically elaborated the waveform synthesis theory. This paper focuses on the detailed analysis of DDS output signal spectrum characteristics and spectrum stray through its mathematic comprehensive expression, and also studies the improvement methods of spectrum stray, which lays a solid foundation for DDS hardware circuit designing. After the comparative Analysis of two arbitrary waveform generator design method based on DDS technology, proposed a arbitrary waveform generator’s overall design scheme based on double DDS circuit structure as core circuit within FPGA design, including the system function logic, system control module, bus interface circuit and filter circuits,etc, FPGA peripheral circuit design. While programming DDS waveform synthesis circuit, adopted pipelined approach to improve DDS circuit structure, which extended its output bandwidth. Based on deeply studying the principle of various modulation signals, realizing AM, FM, FSK, sweep frequency and burst,etc, modulation function modules, directly realizing the signal modulation output by using digital method. On this basis, through the design of bus interface circuit and system instruction set, it realized SOPC hardware system integration of the signal generator, and also finished system related test software design.After the test, it shows that the system output signal frequency resolution can achieve 30mHz, its highest output frequency can reach 30MHz under 125MHz data sampling rate of DAC, frequency accuracy is better than 0.1%. The output signal amplitude characteristic remains intact when connects 50Ωload at the output terminal. Output signal harmonic distortion reached-60dB when the output signal bellows 2MHz, while overall system output waveform harmonic distortion is better than-36dB, which can well meet the needs of system test.

Related Dissertations

  1. Research on Electromagnetic Acoustic Transducer Detection System Based on FPGA,TH878.2
  2. Study on Drive and Control System of Five-Phase PMSM Based on FPGA,TM341
  3. Development of LXI Arbitrary Waveform Generator,TM935
  4. Design of Digital Predistorter for RF Power Amplifier Based on FPGA,TN722.75
  5. Synchronization and Channel Estimation Algorithm in Bursted OFDM System and Its Implementation on FPGA,TN919.3
  6. Performance Analysis of Anti-Multipath Capability in DSSS System and Study on the Compensation Methods,TN914.42
  7. Optimizing and Realising Research on Vedio Compression in TV Guidance System,TN919.81
  8. Research and Hardware Simulation of Multiuser Spread Spectrum Code Acquisition Based on FPGA,TN914.42
  9. Design of Wearable Computer’ Multiprocessor Based on SOPC,TP332
  10. Research on Basic Algorithms of Digital Image Processing and Implementation with FPGA,TP391.41
  11. Research of High Speed Image Pre-processing System Based on FPGA,TP391.41
  12. Design of High-Speed Digital Image Acquisition and Interface Based on FPGA,TP274.2
  13. Development of Inductance Sensor Data Acquisition System Based on FPGA,TP274.2
  14. Development of Serial Bus Analyzer Based on Nios,TP274
  15. Development of PMC High-speed Data Transmission Board Design Based on FPGA-RocketIO_X,TP274.2
  16. Development of Pxibus High Performance Digital I/O Module,TP274
  17. Development of LXI Counter,TP274
  18. A High-Speed and Real-Time Data Acquisition System Based on FPGA,TP274.2
  19. Design of GPS Information Receiving System Based on Nios Ⅱ,TN967.1
  20. Temperature and pressure explosives temperature field memory test technology,TQ560.7
  21. Erbium-doped fiber amplifier pump laser drive source research applications,TN248

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Frequency synthesizer technology,frequency synthesizer > Direct method
© 2012 www.DissertationTopic.Net  Mobile