A nonsvnchronous2 optical orthogonal-codedivision-multiple-access(OOCDMA) system,for the case of no thermal and avalanche photodiode(APD)noise,was recently introduced by Salehi,et al[2].One bit of user's data is transmitted per sequence-period in an OOCDMA system proposed by Salehi.In our paper,a nonsynchronous OOCDMA system that can transmit multibits per sequenceperiod is introduced,and APD and thermal noise,plus interference,are included.This multibits/sequence-period system is much better in bit error probability as well as log2F times higher in throughput than the 1 bit/sequenceperiod syrstem where F=sequence-length.Furthermore,an analysis is performed for the log2F bits/sequence-period system with a hard-limiter placed before the receiver.
展开▼
