03228nas|a2200397 0 4500 20260818084918.0 030696s1995 th uu m rtt 00| a1eng d .b11489522 AIT RSPR no. TC-95-8 Stelly, Mann Construction of 2" codes for use in optical code-division multiple-access (OCDMA) systems and their BER performance Bangkok : Asian Institute of Technology, 1995 52 leaves Research studies project report ; no. TC-95-8 A research study submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1995 Intended for optical code-division multiple access (CDMA) applications, the constructions of a new family of 2 11 codes called the 2 11 extended prime code and the (N, 4, 2, 1) 211 code, are presented in this research study. Since the extended prime code is derived from the well-known prime code by pading some more trailing zeros, the algebraic properties of the extended prime code and the constructed t' code, are still preserved, in particular for the cross-correlation function equal to one. This type of 211 codes can be easily generated by using a simple serial coding architecture, and therefore, a fast reconfiguration time for fully tunable encoders I decoders is guaranteed (ZHANG and PICCHI, 1993). The (N, 4, 2, 1) 211 code is constructed based on Hanani's approach which has been investigated to construct an (N, w, 2, I) optical orthogonal code (OOC). Here, we prove that the obtained (N, 4, 2, 1) OOC can be also an 2" code due to its symmetric pulse positions in the code sequences. Moreover, the performances of the constructed codes are analyzed by using a Gaussian approximation for optical multiple-access interference, and the bit error rates (BER) are discussed in terms of the number of pulses, the code length and the number of simultaneous users. Optical communications Zhang, Jian-Guo, Chairperson Makelainen, Kimmo, Examination Committee Chindakorn Tuchinda, Examination Committee Asian Institute of Technology. Research studies project report ; no. TC-95-8 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15370 .b11489522 mnait v 240404 0 960603 m a v 0 mnait mnait mnarc 20 40 Barcode : 30050120553390 CREATED : 1994-12-18 RECORD # : i11753936 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120553374 CREATED : 1994-12-18 RECORD # : i11753948 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120370159 CREATED : 2016-03-06 RECORD # : i13016829 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 22390 22390 0 0 0 0 MAIN MAIN mnait 2026-08-18 30.00 0 AIT RSPR no. TC-95-8 30050120553390 2026-08-18 08:49:18 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 30.00 0 AIT RSPR no. TC-95-8 30050120553374 2026-08-18 08:49:18 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT RSPR no. TC-95-8 30050120370159 2026-08-18 08:49:18 2026-08-18 40