摘要
混沌数字序列以其优良的伪随机特性,在扩频通信中展示出潜在的应用前景。在Logistic映射的基础上,通过混沌序列当前值与前2个值之间的逻辑运算,并由m序列控制其运算关系与系数,提出一种复杂度更高的用于混沌扩频的数字序列。利用MCS-51单片机作为跳频图案的生成平台以及锁相环电路构成频率合成器,实现了跳速1000跳/s、频点数为256、频率范围从15MHz^17.5MHz的混沌跳频信号发生器。
As its pseudo-random and excellent correlation characteristic, chaotic digital sequence has been applied to spread spectrum communications systems and exhibits the potential application foreground. Based on Logistic-map, by using m sequence, calculating the current and the front two values of chaotic sequence, and controlling the operation relationship as well as cefficients,a novel high complex sequence used to chaotic spread spectrum is proposed. By utilizing Mcs-51 single-chip as the generating plafform of frequency-hopping pattern and the frequency synthesizer constructed by phase-locked loop circuit, a chaotic frequeney hopping signal generator with 1 000 jump/s, 256 frequency points and frequency range from 15 MHz to 17.5 MHz is realized.
出处
《微型机与应用》
2010年第3期44-48,共5页
Microcomputer & Its Applications
基金
国家自然科学基金(60572073
60871025)
广东省自然科学基金(8151009001000060
8351009001000002)资助课题
