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
Date of Defense 1996-09-01 Availability restricted AbstractThe 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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