Title page for ETD etd-0605103-160256


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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