Results 61 to 70 of about 2,557 (191)
A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings [PDF]
, 2001 We report a range of elementary optical coding and decoding experiments employing superstructured fiber Bragg grating (SSFBG) components: first, we perform a comparative study of the relative merits of bipolar and unipolar coding: decoding schemes and ...
Teh, Peh Chiong +3 more
core +1 more source
Guangtongxin yanjiu, 2010 LA序列的非周期自相关及互相关在原点附近存在一个零相关区,将LA序列应用于光码分多址（OCDMA）系统,就可以构成准同步时域相位OCDMA系统。只要将各用户之间的延时控制在同步误差范围之内,就可以消除时域相位OCDMA系统的差拍噪声和多址干扰。文章对16个用户、数据传输速率为1 Gbit/s、传输距离为20 km的准同步时域相位OCDMA系统进行了仿真,仿真结果表明,LA码适用于准同步时域相位OCDMA系统。
肖峥峰, 龚方平, 罗昭, 吉建华
doaj
Multiservice, Multirate IP Transmission Over OCDMA Network [PDF]
, 2013 In this paper, we propose a new Internet protocol (IP) traffic transmission architecture over optical code-division multiple-access (OCDMA) network capable of providing multiservice, multirate transmissions.
Thiago R. Raddo +7 more
core +1 more source
A New Code Family for QS-CDMA Visible Light Communication Systems
Journal of Telecommunications and Information Technology, 2018 Visible light communication (VLC) is a promising technology for wireless communication networks. Optical code division multiple access (OCDMA) is a strong candidate for VLC-based applications. The predominant source of bit error in OCDMA is the multiple
Mouad Addad, Ali Djebbari
doaj +1 more source
Spectral efficiency of incoherent OCDMA systems [PDF]
SPIE Proceedings, 2005 OCDMA allows multiple users to share a common optical channel simultaneously and asynchronously, and thus has many advantages, such as great system capacity, efficient bandwidth utilization, asynchronous access, secure communication, and so on. Many studies on OCDMA techniques have been made in recent years.
Zhuo Chen +4 more
openaire +1 more source
Simulation and Noise Analysis of Multimedia Transmission in Optical CDMA Computer Networks
Journal of ICT Research and Applications, 2013 This paper simulates and analyzes noise of multimedia transmission in a flexible optical code division multiple access (OCDMA) computer network with different quality of service (QoS) requirements.
Nasaruddin Nasaruddin, Tetsuo Tsujioka
doaj
OCDMA-Based LiDAR Systems: Reducing False Alarm Probabilities in Autonomous Driving
IEEE Photonics JournalIn this paper, based on the geometric model of mutual interference between LiDAR systems, and according to the Lambert surface radiation law of objects, the expression of the optical power of the reflected signal received by the jamming user is ...
Tianliang Zeng +3 more
doaj +1 more source
Impact of GVD and SPM on the Performance of DS-OCDMA
Journal of Networks, 2011 The bit error rate (BER) performance of direct sequence optical code division multiple access with cascaded optical amplifiers is analytically investigated in presence of fiber group velocity dispersion (GVD) and self phase modulation (SPM). Super Gaussian-shaped optical orthogonal codes are employed as address sequence for intensity modulation ...
Md. Jahedul Islam +1 more
openaire +2 more sources
Photonics, 2015 This paper proposes a theoretical study to characterize the transmission of optical code division multiple access (CDMA) systems deploying polarization shift keying (PolSK) over a free space optical (FSO) link under the impact of atmospheric turbulence ...
Fan Bai, Yuwei Su, Takuro Sato
doaj +1 more source
Continuum de fréquences optiques pour application OCDMA
, 2010 This thesis works is in line with high-bit-rate optical access systems, where optical fiber bandwidth is shared between several users. In this context, we interest on Optical Code Division Multiple Access (OCDMA) comunication system is considered as an ...
Cordette, Steevy
core +4 more sources