阵列信号源中的窄带噪声实时生成与时延控制技术研究  

Generating and Time-delaying of Narrow-band Noise in Array Signal Source

作　　者：赵慎[1,2] 姚义[1] 郭希维[1] 乔纯捷[2] 

机构地区：[1]军械工程学院导弹工程系,石家庄050003 [2]国防科学技术大学机电工程与自动化学院,长沙410073

出　　处：《计算机测量与控制》2015年第6期2163-2166,共4页Computer Measurement &Control

摘　　要：针对鱼雷声自导测试信号源中的目标辐射信号模拟问题,集中探讨窄带噪声的生成及其通道间时延控制算法;首先研究窄带噪声实时生成算法,基于线性同余法生成均匀噪声,以其作为查询噪声池的地址,产生宽带噪声,并通过带通滤波得到窄带噪声;为保证模拟目标的方位角精度,精确控制各个通道的时延量,提出适用于宽带信号的延时滤波算法,基于多采样率信号处理技术,通过对噪声信号进行插值、延迟、选抽、滤波等操作,提高时延控制精度;结合算法原理分析,得到延时滤波的简化算法;数字仿真表明,提出算法适用于窄带信号实时生成,时延控制精度高。For simulating the targefs signal in testing waveform generator for the torpedo self--guided system, the generating and time --delaying arithmetic algorithm of the narrow--band noise is explored. The real time generating algorithm of the narrow band noise is studied firstly. The uniform distribution noise is generated based on linear congruential algorithm, regarded as the address for querying in the noise pool to obtain the wide--band noise. The narrow--band noise is the output of the narrow--band filter with wide--band noise input. To guarantee the precision of the azimuth of the simulating target, the time delay between different channels should be adjusted accurately. The delaying filter algorithm compliant for wide--band signal is proposed, which is based on the multiple sample rate technique. The accuracy of the time delay is boosted by means of interpolation, delaying, decimating and filtering to the narrow--band noise signal. The abbreviated form of the time delaying filter is derived by the analyzing the principle of the algorithm. The numerical simulation shows that the proposed algorithm is applicable for the generation of narrow--band noise, and the time delay can be adjusted accurately.

关 键 词：阵列信号源 窄带噪声 时延 延时滤波 噪声生成 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]