A comparison between the performance of several optical code-division multiple-access (CDMA) correlation receivers is presented. The performance is measured in terms of an uncoded throughput capacity. It is defined as the maximum data rate (in nats/chip time) that can be achieved with arbitrary small error probability. Both on-off keying (OOK) and pulse-position modulation (PPM) CDMA schemes are considered. Signature code correlations bounded by either one or two are employed. Our results reveal that the throughput capacity of the optical PPM-CDMA systems can be increased by increasing the code-correlation constraint from one to two. That of OOK-CDMA systems, however, cannot be increased. Further, the throughput capacity of PPM-CDMA systems with code-correlation constraint of two is greater than that of OOK-CDMA systems with code-correlation constraint of one or two. In fact, this improvement in the throughput of PPM-CDMA systems over that of OOK-CDMA approaches a limiting factor of 10 as the pulse-position multiplicity increases to infinity.


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    Title :

    Uncoded throughput capacities of optical CDMA communication channels


    Contributors:


    Publication date :

    2002-01-01


    Size :

    541770 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Uncoded Throughput Capacities of Optical CDMA Communication Channels

    Shalaby, H. M. H. / Academy of Scientific Research & Technology / National Radio Science Committee et al. | British Library Conference Proceedings | 2002



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