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DS-CDMA Multiuser Detection-Computer Sciences-Project Report, Study Guides, Projects, Research of Applications of Computer Sciences

Birla Institute of Technology and ScienceApplications of Computer Sciences

This report is for final year project to complete degree in Computer Science. It emphasis on Applications of Computer Sciences. It was supervised by Dr. Abhisri Yashwant at Bengal Engineering and Science University. Its main points are: Pulse, Shaping, Causes, ISI, Bandwidth, Modulation, Technique, Phase, Carrier, Constellation

Typology: Study Guides, Projects, Research

2011/2012

Uploaded on 07/18/2012

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Table of Contents
1. QUADRIPHASE-SHIFT KEYING --------------------------------------------------------01
1.1 BANDWIDTH CONSERVING MODULATION TECHNIQUE---------------------01
1.2 PHASE OF CARRIER-----------------------------------------------------------------------01
1.3 GRAY ENCODED SET OF DIBITS------------------------------------------------------01
1.4 BASIS FUNCTIONS ------------------------------------------------------------------------02
1.5 CONSTELLATION DIAGRAM ----------------------------------------------------------02
1.6 Error Probability of QPSK-------------------------------------------------------------------04
2 .GENERATION AND DETECTION OF COHERENT QPSK SIGNALS---------04
2.1 TRANSMITTER------------------------------------------------------------------------------04
2.2 RECEIVER------------------------------------------------------------------------------------05
2.3 POWER SECTRA OF M-ARYPSK SIGNALS------------------------------------------06
2.4 BANDWIDTH EFFICIENCY---------------------------------------------------------------07
3. Intersymbol Interference (ISI) --------------------------------------------------------------07
3.1 What is Inter symbol interference? ---------------------------------------------------------07
3.2 Causes of ISI-----------------------------------------------------------------------------------08
3.3 Solutions to ISI--------------------------------------------------------------------------------08
3.3.1 Slowing down the signal-------------------------------------------------------------------08
3.3.2 Pulse Shaping--------------------------------------------------------------------------------09
4. MATLAB SIMULATIONS------------------------------------------------------------------17
5. References----------------------------------------------------------------------------------------24
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Table of Contents

    1. QUADRIPHASE-SHIFT KEYING --------------------------------------------------------
  • 1.1 BANDWIDTH CONSERVING MODULATION TECHNIQUE---------------------
  • 1.2 PHASE OF CARRIER-----------------------------------------------------------------------
  • 1.3 GRAY ENCODED SET OF DIBITS------------------------------------------------------
  • 1.4 BASIS FUNCTIONS ------------------------------------------------------------------------
  • 1.5 CONSTELLATION DIAGRAM ----------------------------------------------------------
  • 1.6 Error Probability of QPSK-------------------------------------------------------------------
  • 2 .GENERATION AND DETECTION OF COHERENT QPSK SIGNALS---------
  • 2.1 TRANSMITTER------------------------------------------------------------------------------
  • 2.2 RECEIVER------------------------------------------------------------------------------------
  • 2.3 POWER SECTRA OF M-ARYPSK SIGNALS------------------------------------------
  • 2.4 BANDWIDTH EFFICIENCY---------------------------------------------------------------
    1. Intersymbol Interference (ISI) --------------------------------------------------------------
  • 3.1 What is Inter symbol interference? ---------------------------------------------------------
  • 3.2 Causes of ISI-----------------------------------------------------------------------------------
  • 3.3 Solutions to ISI--------------------------------------------------------------------------------
  • 3.3.1 Slowing down the signal-------------------------------------------------------------------
  • 3.3.2 Pulse Shaping--------------------------------------------------------------------------------
    1. MATLAB SIMULATIONS------------------------------------------------------------------
    1. References----------------------------------------------------------------------------------------
  • Fig.1: Constellation diagram -------------------------------------------------------------------- List of Figures
  • Fig.2: QPSK transmitter---------------------------------------------------------------------------
  • Fig.3: QPSK Receiver----------------------------------------------------------------------------
  • Fig.4: Power spectra of M-ARYPSK signals--------------------------------------------------
  • Fig.5: Slowing down the signal-----------------------------------------------------------------
  • Fig.6: Square pulse in time domain------------------------------------------------------------
  • one half of the bandpass case--------------------------------------------------------------------- Fig.7: the frequency response of the square pulse is a sinc function lowpass bandwidth is
  • Fig.8: The effect of sinc pulse and its frequency----------------------------------------------
  • Fig.9: Raised cosine impulse response---------------------------------------------------------
  • Fig.10: Raised cosine filter------------------------------------------------------------------------