Title :
Performance degradation in coherent OCDMA due to receivers´ bandwidth limit and improvement by using optical thresholding
Author :
Wang, Xu ; Wada, Naoya ; Kitayama, Ken-ichi
Author_Institution :
Inf. & Network Syst. Div., Nat. Inst. of Inf. & Commun. Technol., Tokyo, Japan
Abstract :
The limitation of the receiver´s bandwidth in coherent TS OCDMA system has been investigated theoretically and experimentally. The receiver´s bandwidth limitation will result in severe performance degradation due to the accumulation of the MAI and secondary beat noise. Applying optical thresholding technique in the system could eliminate the out-of-peak MAI and secondary beat noise to improve the performance significantly. The experimental results agree with the theoretical predictions very well. Therefore, it is essential to employ optical thresholder in practical coherent TS OCDMA system with a receiver that performs data-rate detection.
Keywords :
code division multiple access; light coherence; optical information processing; optical receivers; MAI; coherent OCDMA; coherent TS OCDMA system; data-rate detection; optical thresholding; performance degradation; receiver bandwidth limit; secondary beat noise; Bandwidth; Bit error rate; Decoding; Degradation; Multiple access interference; Optical fiber networks; Optical mixing; Optical noise; Optical receivers; Optical transmitters;
Conference_Titel :
Lasers and Electro-Optics Society, 2005. LEOS 2005. The 18th Annual Meeting of the IEEE
Print_ISBN :
0-7803-9217-5
DOI :
10.1109/LEOS.2005.1548167
