Type of Document	Master's Thesis
Author	Vaddiraja, Radhika
Author's Email Address	rvaddi1@lsu.edu
URN	etd-0605103-160256
Title	Generalized D-Sequences and Their Application to CDMA Systems
Degree	Master of Science (M.S.)
Department	Electrical & Computer Engineering
Advisory Committee	Advisor Name Title Subhash Kak Committee Chair Hsiao-Chun Wu Committee Member Suresh Rai Committee Member
Keywords	signal to interference ratio direct sequence spread spectrum decimal sequences sequence length
Date of Defense	2003-04-08
Availability	unrestricted
Abstract Code Division Multiple Access (CDMA), a form of spread spectrum communications is used widely in cellular telephony. CDMA systems employ Walsh-Hadamard orthogonal codes, jointly with Pseudo-Noise (PN) sequences, Gold sequences and Kasami sequences to achieve spreading. This thesis investigates properties of generalized d-sequences and their applications as spreading sequences in CDMA systems. The correlation properties of these sequences are studied. The autocorrelation function of these sequences is not exactly two-valued but the cross correlation values are zero for certain class of these sequences. The zero cross correlation property can be useful in solving the near-far problem in CDMA communication systems, thus obviating the need for power control. The performance of these sequences is analyzed and their application to CDMA systems is investigated.
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