Research on Hyperchaotic Spreading Sequences Based on Ikeda Map
Nan Zhao · Radio Engineering of China · 2008
By over-sample operations on 2-D hyperchaotic map,IM,a novel map named OIM is proposed for the generation of OIMBS(Over-sampled Ikeda Map Binary Sequences).OIMBS are found possessing of better correlation property,balance property,and having higher security than IMBS(Ikeda Map Binary Sequences).Based on the optimal filter strategy for 1-D spreading sequences,Logistic Map binary sequences,IMBS and OIMBS are optimally selected for conventional DS-CDMA communication system respectively,and it is concluded that under a variety of channel conditions,the Bit Error Rate performances of the communication system which adopts OIMBS are anyway more desirable than those of other two systems.