Title :
Channel equalisation for optical wireless multi-user systems utilising orthogonal codes
Author :
Chan, H.H. ; Hussain, A. ; Elmirghani, J.M.H. ; Cryan, R.A.
Author_Institution :
Northumbria Univ., Newcastle, UK
Abstract :
A study is presented for the effects of multipath dispersion on optical diffuse wireless systems. Equalisation results are reported for systems utilising NRZ data and attention is given to channel equalisation for networks based on CDMA and orthogonal codes. A complete realisation technique is described for obtaining a filter matched to the equalised pulse shape. Such a filter is the optimum predetection filter for certain time modulation formats such as PPM. The realisation procedure is shown to be effective and useful when all is available is a time domain specification on the received pulse shape
Keywords :
code division multiple access; codes; equalisers; matched filters; multipath channels; optical communication; optical modulation; pulse position modulation; CDMA; NRZ data; PPM; channel equalisation; equalised pulse shape; multipath dispersion; optical diffuse wireless systems; optical wireless multi-user systems; optimum predetection filter; orthogonal code; realisation technique; received pulse shape; time domain specification; time modulation formats;
Conference_Titel :
Optical Free Space Communication Links, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19960188
