Title :
Performance analysis of LDPC codes over WS-EWC coded optical CDMA networks
Author :
Huang, Chun-Ming ; Huang, Jen-Fa ; Yang, Chao-Chin
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
One extended Welch-Costas (EWC) code family for the wavelength-division-multiplexing/spectral-amplitude coding (WDM/SAC; WS) optical code-division multiple-access (OCDMA) networks is proposed. This system has a superior performance as compared to the previous modified quadratic congruence (MQC) coded OCDMA networks. However, since the performance of such a network is unsatisfactory when the data bit rate is higher, one class of quasi-cyclic low-density parity-check (QC-LDPC) code is adopted to improve that. Simulation results show that the performance of the WS-EWC coded OCDMA network can be greatly improved by using the LDPC codes when data rate is 2.5 Gb/s.
Keywords :
code division multiple access; cyclic codes; optical fibre LAN; parity check codes; wavelength division multiplexing; LDPC code; WS-extended Welch-Costas coded optical CDMA network; local area network; performance analysis; quasi-cyclic low-density parity-check code; spectral-amplitude coding; wavelength-division-multiplexing; Bit rate; Forward error correction; High speed optical techniques; Multiaccess communication; Optical fiber networks; Optical noise; Optical receivers; Parity check codes; Performance analysis; Wavelength division multiplexing; optical code-division multiple-access (OCDMA); quasi-cyclic low-density parity-check (QC-LDPC) codes; spectral-amplitude-coding (SAC); wavelength-division-multiplexing (WDM);
Conference_Titel :
Advanced Communication Technology (ICACT), 2010 The 12th International Conference on
Conference_Location :
Phoenix Park
Print_ISBN :
978-1-4244-5427-3
