Sensitivity of mc cdma access scheme to carrier phase noise and frequency offset
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Sensitivity of MC-CDMA Access Scheme to Carrier Phase Noise and Frequency offset. 姓名 : 吳政修 指導老師 : 黃文傑. outline. Introduction System analysis Simulation Conclusion. The performance loss of an MC-CDMA system. Nonlinear amplifier Phase noise Frequency offset of the RF oscillator

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Sensitivity of mc cdma access scheme to carrier phase noise and frequency offset

Sensitivity of MC-CDMA Access Scheme to Carrier Phase Noise and Frequency offset

姓名:吳政修

指導老師:黃文傑


Outline
outline and Frequency offset

  • Introduction

  • System analysis

  • Simulation

  • Conclusion


The performance loss of an mc cdma system
The performance loss of an MC-CDMA system and Frequency offset

  • Nonlinear amplifier

  • Phase noise

  • Frequency offset of the RF oscillator

  • Chip synchronization timing errors

  • Fading


Introduction
Introduction and Frequency offset

  • MC-CDMA is very sensitive to the signal distortion generated by the imperfect frequency down conversion at the RX due to the local oscillator phase noise and frequency offset.


Assumption
Assumption and Frequency offset

  • A. phase noise model

    fc: carrier frequency of the oscillator

    v(t): random process is a continuous-path Brownian motion process with zero mean and variance


Phase noise
Phase noise and Frequency offset

  • Experimental measurement on real device


B channel model
B. channel model and Frequency offset

  • Indoor-local environments


System analysis
System analysis and Frequency offset

  • The composite spread sequence

  • The signal transmitted in the time interval [0,T)


  • The received signal and Frequency offset

  • The effect of nonideal frequency down conversion and phase noise is modeled by a multiplicative error term

  • After frequency down conversion, the received signal





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