Proposal and Implementation of 2-D OCDMA System with Reconfigurable Array Encoder/Decoder and Double Hard Limiters 


Vol. 29,  No. 7, pp. 705-711, Jul.  2004


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  Abstract

We propose novel OCDMA system with the structure of reconfigurable array encoder/decoder(RAE/ RAD), which are able to reallocate the 2-D optical codes to each subscriber and recover the transmitted data at all the receiving nodes. We have first implemented the double hard limiters composed of limiting amplifier(first hard limiter) that maintain a level of the encoded data fro]11 receiving node and AND detector(second hard limiter) for detecting the position of the encoded data and recovering the data. With the proposed system, it was successfully implemented to recover a specific channel data out of 16 code-multiplxed channels using FPGA and 4 DFB-LDs having distinct wavelengths. From experimental results, the code length resulted from increasing the number of the simultaneously connected channels has been reduced by using 2-D OCDMA multipleced in time and wavelength instead of I-D OCDMA. In addition, bit errors phenomenon on account of deterioration of autocorrelation peak-ta-side lobe ratio is enhanced by using the double hard limiters composed of AND detector and limiting amplifiers.

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  Cite this article

[IEEE Style]

J. Kim, B. Kim, S. Kwon, C. Park, "Proposal and Implementation of 2-D OCDMA System with Reconfigurable Array Encoder/Decoder and Double Hard Limiters," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 7, pp. 705-711, 2004. DOI: .

[ACM Style]

Jin-suck Kim, Bum-ju Kim, Sun-young Kwon, and Chong-dae Park. 2004. Proposal and Implementation of 2-D OCDMA System with Reconfigurable Array Encoder/Decoder and Double Hard Limiters. The Journal of Korean Institute of Communications and Information Sciences, 29, 7, (2004), 705-711. DOI: .

[KICS Style]

Jin-suck Kim, Bum-ju Kim, Sun-young Kwon, Chong-dae Park, "Proposal and Implementation of 2-D OCDMA System with Reconfigurable Array Encoder/Decoder and Double Hard Limiters," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 7, pp. 705-711, 7. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880