采用分割频带法构造宽间隔跳频序列

Generating FH Sequences with Given Minimum Gap by Frequency Band Division

为增强对偶频带法的保密性,提出了融入随机特性的宽间隔处理新方法——分割频带法。首先对给定的频带进行均匀划分,分割后各区间频带频点相互对应,然后按照随机跳变优先原则或平均间隔优先原则构造区间频带表,以控制跳变规律,实现各频带间的随机转换。分割频带法继承了对偶频带法的核心思想,不改变原始序列的周期长度。理论分析和Matlab仿真结果表明,分割频带法构造的宽间隔序列性能优越,在不恶化序列汉明相关性的前提下,提升了序列保密性和平衡性,可作为宽间隔处理的有效方法。

To strengthen the confidentiality of the dual-band method,a new method added randomness--frequency band division is proposed. At first,the given frequency band is evenly divided,and every fre-quency of different bands corresponds to each other. Then a frequency band table with randomness prior oraverage gap prior is generated to control hopping and changing among bands. Core idea of the dual-bandmethod is inherited and the cycle length won爷t be changed. Theoretical analysis and simulation with Matlabshow that sequences generated by the proposed method perform well. On the premise that Hamming correla-tion property doesn＇t worsen,confidentiality and balance have been further improved and the method canbe used as an effective method of wide interval processing.