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Title page for ETD etd-12172003-134031

Type of Document Dissertation
Author Gharaibeh, Khaled Mohammad,
Author's Email Address kmgharai@unity.ncsu.edu
URN etd-12172003-134031
Title Design Methodology for Multichannel Communication Systems
Degree PhD
Graduate Program Electrical Engineering
Advisory Committee
Advisor Name Title
Michael B. Steer Committee Chair
GIANLUCA LAZZI Committee Member
JEAN-PIERRE FOUQUE Committee Member
Keith Townsend Committee Member
Keywords
  • Multichannel
  • Power amplifier
  • nonlinear system
  • statitical
  • autocorrelation function
  • power spectral density
  • Volterra series
  • memoryless
  • probability of error
  • Gaussian
  • random process
  • code division multiple access
  • intermodulation
  • adjacent channel power ration
  • spectral regrowth.
Date of Defense 2003-12-15
Availability unrestricted
Abstract
A methodology for understanding and modeling the interaction of multiple CDMA

signals in a nonlinear multichannel environment is introduced and veriŻed. The analysis is

based on understanding the statistical properties of input signals and developing a modeling

technique that enables distortion to be estimated. This is coupled with the introduction

of a new behavioral modeling technique that captures the black box characteristics of mul-

tichannel ampliŻers. In addition, a performance analysis that relates nonlinear distortion

to probability of bit error (BER) is introduced. The analysis presented here provides an

insight into communication system design by relating distortion to system performance.

The methodology is verified using simulations and measurements performed on a nonlinear

power amplifier. A nonlinear model was extracted and used in developing the statistical

model by which distortion is estimated. The resulting estimates of distortion were verified

using measurements of distortion performed on the amplifier using the IS-95 CDMA system

standard.
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