无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
2期
77-80
,共4页
混沌%Logistic-map%有限字长效应%长周期
混沌%Logistic-map%有限字長效應%長週期
혼돈%Logistic-map%유한자장효응%장주기
chaos%logistic-map%finite precision effect%long period
利用无周期的混沌映射生成长周期伪随机序列具有巨大的优越性，但有限字长效应会使混沌序列出现动力学特征退化，从而出现短周期现象，导致混沌序列安全性显著降低。分析了采用整数类型实现Logistic型混沌序列对周期特性的影响，指出整数型Logitstic-map序列不具备长周期特性，提出了一种利用m序列加扰Logistic-map的长周期混沌序列发生器的实现方案，并对输出序列特性进行了仿真分析。该方案易于实现，降低了长周期对整数位数的要求，输出序列的周期得到明显扩展，随机性、相关性和线性复杂度良好。
利用無週期的混沌映射生成長週期偽隨機序列具有巨大的優越性，但有限字長效應會使混沌序列齣現動力學特徵退化，從而齣現短週期現象，導緻混沌序列安全性顯著降低。分析瞭採用整數類型實現Logistic型混沌序列對週期特性的影響，指齣整數型Logitstic-map序列不具備長週期特性，提齣瞭一種利用m序列加擾Logistic-map的長週期混沌序列髮生器的實現方案，併對輸齣序列特性進行瞭倣真分析。該方案易于實現，降低瞭長週期對整數位數的要求，輸齣序列的週期得到明顯擴展，隨機性、相關性和線性複雜度良好。
이용무주기적혼돈영사생성장주기위수궤서렬구유거대적우월성，단유한자장효응회사혼돈서렬출현동역학특정퇴화，종이출현단주기현상，도치혼돈서렬안전성현저강저。분석료채용정수류형실현Logistic형혼돈서렬대주기특성적영향，지출정수형Logitstic-map서렬불구비장주기특성，제출료일충이용m서렬가우Logistic-map적장주기혼돈서렬발생기적실현방안，병대수출서렬특성진행료방진분석。해방안역우실현，강저료장주기대정수위수적요구，수출서렬적주기득도명현확전，수궤성、상관성화선성복잡도량호。
It is fairly attractive to implement a long period pseudo-random bit generator based on aperiodic chaotic mapping.The finite precision effect may make chaotic sequence generate dynamical degradation property,which results in short-period phenomenon and low security of chaotic sequence.This paper analyzes the impact of Logistic chaotic sequence implemented by integer type on perio-dicity,and the analysis results show that the integer-type Logistic-map hasn’ t long-period characteristics.This paper proposes an imple-ment scheme of extending the cycle length via perturbation of m-sequence.The output sequence characteristics are simulated and ana-lyzed.The simulation results show that this scheme is easily implemented,by which the period of out sequence is significantly extended and the original chaotic properties can be maintained.
