PROJECT TITLE :
Performance analysis of single and multirate FFH-OCDMA networks based on psk modulation formats
In this paper, the performance of single and multirate fast frequency hopping optical code-division multiple-access (FFH-OCDMA) networks based mostly on coherent modulation formats is addressed. The following modulation formats are assumed: binary and quadrature section shift keying (BPSK and QPSK). For single rate networks, BPSK and QPSK are used because the modulation formats for all users. On the other hand, for multirate networks, BPSK and QPSK modulation formats are utilized for low- and high-rate transmission users, respectively. For both networks, new bit error rate (BER) formalisms concerning the main deleterious source in OCDMA are derived, particularly multiple-access interference. The mathematical formalism developed here accounts for any kind of users??? signal waveforms (that are accurately accounted for at the required user???s receiver). Therefore, it can be successfully used to hold out performance analysis of any OCDMA network. In this paper, it is shown that both low- and high-rate users can surprisingly achieve similar BER levels. In addition, it is demonstrated that incoherent on???off-keying-primarily based networks are not sensible candidates for future single and multirate FFH-OCDMA implementations in this interference restricted situation. On the other hand, our results pave the means for BPSK- and QPSK-based mostly networks, which are seen as potential candidates for next generation passive optical networks (NG-PON2), where higher knowledge rates and an enormous amount of users will be major network requirements.
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