منابع مشابه
Keys towards practical OCDMA networks
The performance comparison of different OCDMA schemes is addressed in this paper. As the result, the merits of coherent 1-D time-spreading and spectral coding schemes and incoherent 2-D scheme are highlighted. The keys towards practical OCDMA networks are discussed in terms of en/decoder, optical sources, optical thresholding as well as multiple access interferences and beat noise suppression. ...
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In this paper we consider an optical code division multiple access (OCDMA) indoor wireless communication system using spectral encoding and evaluate its performances in cases of classical OCDMA, dynamic OCDMA and OCDMA with deconvolution. We present an analysis of the receiver movement influence on the indoor wireless communications system performances. As the receiver moves increasingly away f...
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We propose an asynchronous gigabit-symmetric optical code division multiplexing access passive optical network (OCDMA-PON) in which optical network units (ONUs) are source-free. In the experiment, we demonstrate a duplex OCDMA system with a 50 km 10 Gbit/s/user 4-user DPSK-OCDMA downlink and a 50 km 10 Gbit/s/user 4-user OOK-OCDMA uplink and error-free duplex transmissions are achieved. Besides...
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Since mobile hosts suffer from burst and location-dependent channel errors in wireless networks, packet fair queueing algorithm in wireline networks cannot be applied directly to wireless networks. Generally, a fair scheduler in a wireless network retains the virtual time of flow when the flow encounters channel errors. This results to the flow having higher priority when it exits from errors, ...
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In this paper optical code-division multiple-access (OCDMA) packet network is considered, which offers inherent security in the access networks. Two types of random access protocols are proposed for packet transmission. In protocol 1, all distinct codes and in protocol 2, distinct codes as well as shifted versions of all these codes are used. O-CDMA network performance using optical orthogonal ...
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ژورنال
عنوان ژورنال: Journal of the European Optical Society: Rapid Publications
سال: 2013
ISSN: 1990-2573
DOI: 10.2971/jeos.2013.13013