Title :
Capacity improvement of a hybrid CDMA/WDMA system by various bandwidth allocations
Author :
Chang, Po-Hao ; Lin, Wan-Chi
Author_Institution :
Nat. Dong Hwa Univ., Hualien, Taiwan
Abstract :
We propose a hybrid CDMA/WDMA LAN architecture. The CDMA scheme is based upon spectral coding. For CDMA, the system performance will be improved greatly by increasing the code length so that it can accommodate more users. We calculate the system capacity under three types of code length, namely 128, 256, and 512. When the proportion of usable bandwidth that is allocated to CDMA users is decreased, the total number of users of hybrid system will decrease but the total bit rate will increase. 100 GHz and 50 GHz are used as the adjacent channel spacing of WDMA.
Keywords :
bandwidth allocation; channel capacity; code division multiple access; encoding; optical fibre LAN; spectral analysis; wavelength division multiplexing; 100 GHz; 50 GHz; adjacent channel spacing; bandwidth allocations; bit rate; code length; hybrid CDMA/WDMA LAN architecture; hybrid CDMA/WDMA system; spectral coding; system capacity improvement; Bandwidth; Bit rate; Decoding; Lenses; Multiaccess communication; Optical fiber communication; Optical pulses; Optical receivers; Optical transmitters; Pulse modulation;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1183330
