Code acquisition of random optical codes in optical code-division multiple-access

• Published in: IET communications Vol. 6; no. 18; pp. 3176 - 3188
• Main Authors: Martín-González, J.A., González, O., Poves, E., López-Hernández, F.J., Pérez-Jiménez, R.
• Format: Journal Article
• Language: English
• Published: Stevenage John Wiley & Sons, Inc 18.12.2012
• Subjects: Acquisitions; Algorithms; Confidence intervals; Estimators; Marketing; Markov processes; Optimization; Proposals
• ISSN: 1751-8628; 1751-8636
• DOI: 10.1049/iet-com.2012.0305

In this study, the authors present a technique for code acquisition in optical code-division multiple-access systems using the recently introduced random optical codes. In these systems, the communication is divided in two parts: a synchronisation process and the data transmission. The main target of the study is to describe and analyse the new algorithm of synchronisation using Markov processes. Once described the code acquisition technique and established an estimation for the probability of false alarm (FA) of the proposed scheme, two different proposals for the optimisation of the code parameters are described. They are based on two different estimators for the probability of FA. The first one considers the expected value for the probability of FA. The second one is very much restrictive. It guarantees that, the probability of FA is in a confidence interval. Thus, the authors have proposed to guarantee the probability of FA in a confidence interval. A compromise between reliability and acquisition time is obtained, with this second method.