IRMA-International.org: Creator of Knowledge
Information Resources Management Association
Advancing the Concepts & Practices of Information Resources Management in Modern Organizations

Symbolic Computation for DS-CDMA Code Acquisition Using First Order Logic

Symbolic Computation for DS-CDMA Code Acquisition Using First Order Logic
View Sample PDF
Author(s): Ruo Ando (Keio University, Japan) and Yoshiyasu Takefuji (Keio University, Japan)
Copyright: 2008
Pages: 10
Source title: Intellectual Property Protection for Multimedia Information Technology
Source Author(s)/Editor(s): Hideyasu Sasaki (Ritsumeikan University, Japan)
DOI: 10.4018/978-1-59904-762-1.ch011

Purchase

View Symbolic Computation for DS-CDMA Code Acquisition Using First Order Logic on the publisher's website for pricing and purchasing information.

Abstract

Code division multiple access (CDMA) is widely used because of its effectiveness to send multiple signal and confidentiality of career signal. We present a formulation of state-space problem of which solution is directed by redundant reasoning control method for semiheuristic and lightweight DS-CDMA code acquisition. The reasoning of the state-space problem provides us with the way to find a K bit synchronized sequence among K dephased sequences with less calculation cost, compared with serial search and matched filter. In this process, redundancy-restriction method, called weighting strategy, enhances the searching ability of FOL (first order logic) reasoning for the faster and lightweight code acquisition. The combination of weighting strategy and correlator enables us to achieve the peak-detection within K/3 times of calculating inner products and its measurement. Our system is evaluated by the reduced cost of proving state-space problem using weighting strategy and its robustness of using the proposal code acquisition framework. Experiment shows that the proposal method is robust if K/N sequences are grouped with N ranging from 3 to 5.

Related Content

Ben van Lier. © 2018. 21 pages.
Jose-Luis Perez-Trivino. © 2018. 18 pages.
Gabriel R. Ricci. © 2018. 20 pages.
Tommaso Bertolotti, Selene Arfini, Lorenzo Magnani. © 2018. 14 pages.
Francesco Albert Bosco Cortese. © 2018. 31 pages.
Lambèr Royakkers, Peter Olsthoorn. © 2018. 18 pages.
John Forge. © 2018. 11 pages.
Body Bottom