鱼雷技术2011，Vol.19Issue(6)：433-437,478,6.
基于LAS码与混沌的水下LPI波形设计
Underwater LPI Waveforms Design Based on LAS Code and Chaos
洪嘉翔 1易红 2张娟 1张林让1
作者信息
- 1. 西安电子科技大学雷达信号处理国防科技重点实验室,陕西西安,710071
- 2. 中国船舶重工集团公司第705研究所,陕西西安,710072
- 折叠
摘要
Abstract
In view of the requirement for low probability of intercept (LPI) waveform characteristics in underwater detection, we serialize the chaotic sequences and use it to modulate the signal phase such that the basic waveform is obtained. Then the large area synchronized (LAS) codes are introduced for both interpulse and intrapulse modulations to design two new waveforms. Relying on the zero-delayed section and zero-Doppler section of an ambiguity function, we compare the discrimination property of the two new waveforms intuitively with four kinds of typical underwater detection waveforms, I.e. Continuous waveform (CW), linear frequency modulation (LFM) waveform, binary phase shift keying (BPSK) waveform and Costas waveform. Quantification analysis is made by their time resolution constants and frequency resolution constants. In addition, nonzero-Doppler section of an ambiguity function is used to compare their Doppler sensitivity characteristics under the ideal background, followed by a further comparison of reverberation suppression capability via the Q function. The results show that two new waveforms have outstanding distance resolution, Doppler tolerance and reverberation suppression capability over whole velocity ranges required by practical use.关键词
自低截获概率/大区域同步(LAS)码/混沌/分辨特性/多普勒敏感性/抗混响性能Key words
low probability of intercept(LPI)/large area synchronized (LAS) code/chaos/resolution characteristic/Doppler sensitivity/reverberation suppression capability分类
军事科技引用本文复制引用
洪嘉翔,易红,张娟,张林让..基于LAS码与混沌的水下LPI波形设计[J].鱼雷技术,2011,19(6):433-437,478,6.
