Title :
Indoor infrared LANs with multiple access facilities based on hybrid PPM CDMA
Author :
Elmirghani, Jaafar M H ; Cryan, Robert A.
Author_Institution :
Dept. of Electr., Electron. Eng., Northumbria Univ., Newcastle, UK
Abstract :
A new hybrid based on pulse position modulation code division multiple access (PPM CDMA) is proposed and studied in the context of the indoor infrared LAN. The utilisation of optical orthogonal codes (OOC) as signature sequences is investigated. Original results are presented illustrating the improvement in bit rate achieved by utilising PPM CDMA rather than on-off keying (OOK) CDMA. It is demonstrated that there exists an optimum PPM order, at a given number of users, that maximises the achievable bit rate. Original results are presented for the false alarm errors due to the OOC cross-correlations while the optimum system operating parameters that minimise these errors are specified
Keywords :
channel capacity; code division multiple access; codes; optical fibre LAN; pulse position modulation; wireless LAN; OOC cross-correlations; bit rate; false alarm errors; hybrid PPM CDMA; indoor infrared LANs; multiple access facilities; optical orthogonal codes; optimum PPM order; optimum system operating parameters; pulse position modulation code division multiple access; signature sequences; Bandwidth; Bit rate; Local area networks; Multiaccess communication; Optical fiber communication; Optical fiber networks; Optical receivers; Optical sensors; Spine; Wireless networks;
Conference_Titel :
Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2486-2
DOI :
10.1109/ICC.1995.524200
