By Topic

Optical CDMA system using embedded transmission method with Manchester signaling

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

5 Author(s)
Iwata, A. ; Dept. of Inf. & Comput. Sci., Keio Univ., Japan ; Sawagashira, H. ; Sonoda, T. ; Kamakura, K.
more authors

We propose an optical CDMA system using the embedded transmission (ET) method with Manchester signaling. In the proposed system, transmission bits are embedded in the signature sequence used in optical CDMA systems. Although the Manchester signaling uses two slots for a transmitted bit, the two slots are included in the chip duration of optical CDMA.. According to an embedded bit, an optical pulse is transmitted in either slot. In the receiver, the threshold detection for the embedded bits reduces the effect of multiple access interference (MAI) into the erasure state, which is not a transmitted signal. By using a codeword of the BCH codes as the transmitted bits, the effect of MAI is removed in the decoding procedure of BCH codes. Since the decoding procedure treats the effect of MAI as the erasure bits, instead of the error bits, using extended BCH(eBCH) codes allows us to remove the effect of MAI more efficiently. We analyze the bit error rate (BER) of the system using the ET method with Manchester signaling on the assumption that photodetector outputs obey the Poisson distribution. We show that the system using the ET method with Manchester signaling achieves better BER performance than that without Manchester signaling

Published in:

Communications, Computers and signal Processing, 2001. PACRIM. 2001 IEEE Pacific Rim Conference on  (Volume:2 )

Date of Conference: