<ETD> Submission Form - Cataloger

Name:
Zhigang Rong

Email address:
rong@birch.ee.vt.edu

Title:
Simulation of Adaptive Array Algorithms for CDMA Systems

Date of defense:
September 5, 1996

Document Type:
Thesis

Degree:
Master of Science

Department:
Electrical Engineering

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 (MT-LSCMA) 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 multipath environment). It is also shown that these two algorithms have less complexity and can converge faster than the other algorithms.

Keywords:
Adaptive Antennas, Adaptive Algorithm, CDMA

Availability:
In 3 months.

Public URL:
http://scholar.lib.vt.edu/theses/public/etd-3225151289642551/etd-title.html



List of attached files

File NameSize (Bytes)
ZhigangRong.pdf1,440,280 Bytes


Date item approved:
07/14/97

Fees:
Archiving fee received.