Title page for ETD etd-09182008-063401


Type of Document Master's Thesis
Author Rong, Zhigang
URN etd-09182008-063401
Title Simulation of adaptive array algorithms for CDMA systems
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Rappaport, Theodore S. Committee Chair
Reed, Jeffrey H. Committee Member
Woerner, Brian D. Committee Member
Keywords
  • adaptive algorithm
  • adaptive antennas
  • CDMA
Date of Defense 1996-09-01
Availability restricted
Abstract
The increasing demand for mobile communication services without a corresponding increase

in RF spectrum allocation motivates the need for new techniques to improve spectrum

utilization. The CDMA and adaptive antenna array are two approaches that shows real

promise for increasing spectrum efficiency. In this research, we investigate the performance

of different blind adaptive array algorithms in the CDMA systems. Two novel algorithms,

least-squares despread respread multitarget array (LS-DRMTA) and least-squares despread

respread multitarget constant modulus algorithm (LS-DRMTCMA), are developed, and a

MATLAB ™ simulation testbed is created to compare the performance of these two novel

algorithms with those of the multitarget least-squares constant modulus algorithm (MTLSCMA)

and multitarget steepest-descent decision-directed (MT-SDDD) algorithm. It is

shown from the simulation results that these two novel algorithms can outperform the

other algorithms in all the test situations (e. g., AWGN channel, timing offset case, frequency

offset case, and multi path environment). It is also shown that these two algorithms

have less complexity and can converge faster than the other algorithms.

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