基于目标加速度的DTTB信号模糊函数副峰抑制算法  

DTTB signals side peaks suppression algorithms based on target acceleration

作　　者：袁春姗[1] 

机构地区：[1]昆明船舶设备研究试验中心,云南昆明650051

出　　处：《太赫兹科学与电子信息学报》2015年第5期729-735,共7页Journal of Terahertz Science and Electronic Information Technology

摘　　要：具有自主知识产权的国标地面数字电视广播(DTTB)信号以其高发射机功率、大的覆盖面积、宽的信号带宽等优点,成为热门雷达辐射源。但由于信号帧头存在周期性重复或变化,在进行模糊函数分析时不可避免地产生周期性副峰的问题,这直接影响到信号的探测性能。随着研究的深入和科技的发展,所面临的侦察的目标加速度也越来越大,加速度已经成为不可忽视的因素,而传统抑制副峰的算法,没有考虑加速度的影响。因此提出一种思路,利用目标的加速度抑制DTTB周期重复引起的副峰。仿真分析表明,该算法能有效抑制DTTB信号距离多普勒副峰。Chinese standard Digital Television Terrestrial Broadcasting(DTTB) signals have become a hot radar emitter due to their remarkable advantages such as high transmitter power, large coverage area, and wide signal bandwidth. However, in consequence of the periodic repeat of signal frame head, it inevitably generates periodic side peaks during ambiguity function analysis, which directly affects the signal detection performance. Therefore, it is essential to suppress side peaks. With the development of the technology, the acceleration of target reconnoitred increases continuously, which makes the acceleration to be an important factor and can not be ignored. Nevertheless, the influences of acceleration have not been considered in traditional side peaks suppression algorithm. In this paper, a new side peaks suppression algorithm based on target acceleration is presented to suppress side peaks caused by DTTB signals periodic repeat. The simulation results show that this method can effectively suppress DTTB signal range and Doppler peaks.

关 键 词：地面数字电视广播 加速度 模糊函数 副峰抑制 

分 类 号：TN911.7[电子电信—通信与信息系统]