文档介绍：西安电子科技大学
硕士学位论文
Gold码调相连续波雷达的波形设计及信号处理研究
姓名:李长江
申请学位级别:硕士
专业:信号与信息处理
指导教师:赵益民
20050101
摘要
伪码调相连续波雷达的扩频特性和大时宽带宽积使其具有优越的性能,越来
越受到人们的关注。m 序列具有优良的双值自相关特性,在工程实践中得到了广
泛的应用。但 m 序列的优选对数目较少,其应用受到限制。Gold 码序列克服了 m
序列的不足,它的可用地址数远大于 m 序列,自相关旁瓣较小、互相关函数有界,
且结构简单、易于实现。
本文系统介绍了脉冲压缩理论及其实现方式,给出了 m 序列和 Gold 码序列产
生的方法和基本特性。结合战场监视雷达的战术应用实际,从模糊函数理论出发
进行了 Gold 码调相连续波雷达的波形设计,并给出了 Gold 码调相连续波雷达信
号处理模型和仿真结果。最后讨论了 Gold 码序列在雷达组网中的应用。理论研究
和仿真表明,Gold 码调相连续波雷达具有测速测距精度高、多址、低截获概率、
抗干扰性能好等一系列独特的优良性能,必将在现代雷达对抗中发挥重要的作用。
关键词:连续波雷达 Gold 码序列脉冲压缩模糊函数
Abstract
With its eminent performance derived from its spreading spectrum and large
time-bandwidth product, the Pseudo-random code continuous-wave (PRC-CW) radar is
drawing more and more attention. m-sequence, which possesses excellent double-value
autocorrelation, has gained far-ranging applications in the engineering practices.
However, as the optimum pairs of m-sequence are limited in number, its application is
greatly restricted. The Gold sequence, with its more numerous address numbers, smaller
sidelobe and bounded cross correlation function, has e the deficiencies of the
m-sequence, and is also simple in structure and easy to be realized.
This paper systematically introduces the theory of pression and the way
to realize it, presents the generation method and features of m- and Gold-sequence,
designs the waveform of Gold coded CW radar based on ambiguity function theory and
tactical use of battlefield surveillance radar, gives the simulation results and
signal-processing model of Gold coded CW radar, and in the end discusses the
application of Gold-sequence in the work. Both the theoretical research and
simulation result have shown that the Gold coded CW radar has a unique series of high
performances, such as high accuracy in speed and range measurement, multiple access,
Low Probability of Interception (LPI) and anti-jamming capacity, and it will play an
important role in modern radar c