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Design and Implementation of Phase Noise Meter in Digital Method

Rezvani, Mohammad Reza | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51545 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Banai, Ali
  7. Abstract:
  8. Phase noise is one of the important parameters in telecommunication systems and its measurement has always been considered. Digital phase noise measurement methods have a simpler implementation and calibration than analog types. Also, in digital methods, amplitude noise and phase noise can be separated and measured both at the same time. Comparing the phase noise of two oscillators with different frequencies is another major advantage of digital methods. The sensitivity of digital methods is limited to the noise of their analog-to-digital converters. Cross-correlation technique is used to reduce the minimum measurable level of phase noise. This method reduces the internal noise of the measurement system by calculating phase noise from two completely identical paths. In this way, lower levels of phase noise can be measured. Therefore, in this project, the input oscillator is sampled directly and then phase noise is calculated by digital signal processing, and finally, the cross-correlation technique is applied. In this project, the sampling frequency is 125Msps and the input frequency range is 5MHz to 57.5MHz. Also, the minimum measurable level of phase noise is -160dBc/Hz at offset of 100kHz from the carrier
  9. Keywords:
  10. Phase Noise Measurment ; Cross Correlation ; Oscillators ; Analog to Digital Converter ; Offset Calibrations ; Power Line Carrier (PLC)Analog ; Phase Noise

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