A Code Acquisition Scheme Based on Multiple Threshold for Optical CDMA Systems
نویسندگان
چکیده
In this paper, we propose an enhanced code acquisition scheme for optical code division multiple access (CDMA) systems. By using multiple thresholds, the proposed scheme provides a shorter mean acquisition time (MAT) than that of the conventional multiple-shift (MS) scheme. The simulation results demonstrate that the MAT of the proposed scheme is shorter than that of the conventional MS scheme in both single-user and multi-user environments.
منابع مشابه
A Fast Code Acquisition Scheme for O-CDMA Systems
This paper proposes a fast code acquisition scheme for optical code division multiple access (O-CDMA) systems. Unlike the conventional scheme, the proposed scheme employs multiple thresholds providing a shorter mean acquisition time (MAT) performance. The simulation results show that the MAT of the proposed scheme is shorter than that of the conventional scheme. Keywords—Optical CDMA, acquisiti...
متن کاملA Rapid Code Acquisition Scheme in OOC-Based CDMA Systems
We propose a code acquisition scheme called improved multiple-shift (IMS) for optical code division multiple access systems, where the optical orthogonal code is used instead of the pseudo noise code. Although the IMS algorithm has a similar process to that of the conventional MS algorithm, it has a better code acquisition performance than the conventional MS algorithm. We analyze the code acqu...
متن کاملEmerging Optical CDMA Techniques and Applications
In this paper we present an in-depth review on the trends and the directions taken by the researchers worldwide in Optical Code Division Multiple Access (OCDMA) systems. We highlight those trends and features that are believed to be essential to the successful introduction of various OCDMA techniques in communication systems and data networks in near future. In particular we begin by giving a c...
متن کاملPerformance Analysis of MDSS Code Acquisition Using SLS for Optical CDMA Systems
We propose a multiple dwell serial search (MDSS) code acquisition for optical code-division multiple-access (O-CDMA) systems and theoretically analyze its performance. The search/lock strategy (SLS) is used as verification scheme for the multiple dwell detector. The operation of SLS is modeled by finite Markov chain to analyze the performance of the proposed system. Effect of system parameters,...
متن کاملSerial acquisition performance of single-carrier and multicarrier DS-CDMA over Nakagami-m fading channels
In this paper, we investigate the issue of pseudo noise (PN) code acquisition in single-carrier and multicarrier (MC) direct-sequence code-division multiple-access (DS-CDMA) systems, when the channel is modeled by frequency-selective Nakagamifading. The PN code acquisition performance of single-carrier and MC DS-CDMA systems is analyzed and compared when communicating over Nakagamifading channe...
متن کامل