But when the frequency of components is too near, HHT cannot shift the narrowband signal because of mode confusion.
但由于模态混淆，当信号组合分量的频率太接近时，HHT常不能正确分解窄带信号。
In contrast to narrowband signal processing, wideband signal processing can result in the worsening of digital range, sensitivity and multiple signals processing, etc.
相对于窄带而言，宽带会导致数字动态、灵敏度、多信号处理等变差。
Computer simulation shows that the DOA estimation algorithm based on CS theory can estimate accurately the narrowband signal DOA information in relatively small samples case.
计算机仿真实验表明，基于CS理论的DOA估计算法能够在采样点相当少的情况下精确估计出窄带信号的DOA信息。
The essence of the fact that wideband signal can not be effectively transmitted using narrowband phased array in scenarios with large aperture and scan Angle is given.
以线性调频信号为例，揭示窄带相控阵在大孔径宽扫描角情况下不能有效发射宽带高分辨信号的实质。
The system can issue a pure tone, tone twitter, narrowband noise and natural sound of the voice signal, and can adjust the loudness and frequency of the signals with some accuracy.
该系统能发出纯音、啭音、窄带噪声和自然声等声音信号，并可对信号进行一定精度的响度和频率调节。
Broadband array signal processing is a main direction of underwater acoustic signal processing, but the broadband signal processing is more complex than that of narrowband.
宽带阵列信号处理是水声信号处理的一个主要研究方向，但是宽带水声信号的处理远比窄带信号复杂的多。
The detection problem of dim signal is studied based on narrowband dual-polarization radar system.
针对窄带极化雷达系统，本文研究了微弱信号的检测问题。
The bandwidth of target signal after stretch processing and narrowband filtering, the data sample ratio and computing burden are reduced greatly and the method is easy for engineering implementation.
经拉伸处理和窄带滤波的目标信号带宽大大降低，数据采样率也大大降低，因此计算量减小，利于工程实现。
For RFI and narrowband noise interferences, this dissertation studies notch filter and spectrum equilibrium and USES them to suppress narrow jammings in signal domain.
对于RFI和窄带噪声干扰，本文研究了频域陷波和谱均衡两种方法，并将之应用到信号域来抑制窄带干扰。
The small signal analysis for high frequency modulation characteristics of specific wavelength laser diode with narrowband filter was presented.
采用窄带滤光片作为选频元件对精确波长激光器高频调制特性进行了小信号分析。
One of the most prominent "discoveries" occurred in 1977 when Dr Jerry Ehman observed a powerful narrowband radio signal detected by the Big Ear radio telescope in the Ohio State University.
其中最杰出的发现一次发现发生在1977年，当时杰瑞·艾曼博士在俄亥俄州立大学用大耳的天文望远镜探测到一种很强的窄频带无线电。
It is concluded that both of the representations are applicable to study narrowband pulse, but for broadband pulse only rigorous complex analytical signal representation should be adopted.
因此，窄带脉冲光束可以采用复振幅包络和复解析信号两种表示式来研究，而对于宽带脉冲光束，必须采用严格的复解析信号表示式。
A soft decision fusion algorithm is proposed for underwater signal detection, and its performance for narrowband underwater signal detection is tested through computer simulation.
提出了一种基于软决策融合的水声信号检测融合算法，并结合窄带声呐信号检测系统，给出了融合系统检测性能的计算机仿真结果。
But to the CW pulse signal with changing frequency, it is difficulte to realize tracking filter with common narrowband filter.
但是，对于中心频率不断变化的CW脉冲信号，使用常规的硬件窄带滤波器很难实现对其跟踪滤波。
When dealing with the nonstationary signals, the performance of traditional methods in array signal processing may degrade heavily because of the narrowband and stationary signals assumptions.
建立在平稳窄带假设基础上的传统阵列信号处理方法在分析处理这类信号时受到局限。
But to the CW pulse signal with changing carrier wave frequency, common filter cannot achieve narrowband filter, whereas broadband filter cannot reach the request of the signal-noise ratio.
可是，对于载波频率不断变化的CW脉冲信号，普通的滤波器难以实现窄带跟踪滤波，而宽带滤波又不能达到提高信噪比的要求。
Through the spectrum sensing and cognitive engine technology, the characteristics of narrowband interference signal is extracted, which is the rule to design the trap filter.
通过频谱感知和认知引擎技术提取窄带干扰频谱特征作为陷波器的设计依据。
The detection problem of dim signal is studied based on mono-frequency or narrowband dual-polarization radar system in this paper.
该文针对窄带极化雷达系统，研究了微弱信号的检测问题。
Corresponding to the narrowband dual - polarization radar system, the detection problem of dim signal is studied in this paper.
本文研究了窄带极化雷达的微弱目标检测问题。
In this article, performance of estimation of signal parameters in PAssive Synthetic Array (PASA) is studied, focusing on the background of airborne platform intercepting narrowband microwave signals.
针对利用机载运动平台对窄带微波信号进行侦测的背景，研究了被动虚拟阵列(PASA)对窄带微波信号的参数估计性能。
The technique of orthogonal narrowband noise modulation is based upon the classical formula of narrowband random signal.
研究了由乘性和加性噪声的线性组合作为调制噪声的线性系统的随机共振。
The problem of PN code acquisition is the key technique in DSSS receiver when there are narrowband interferences in the received signal.
本文针对新型的卫星用接收机伪码捕获的性能指标要求 ，设计了一种基于中频直接采样数字化的伪码捕获算法。
The problem of PN code acquisition is the key technique in DSSS receiver when there are narrowband interferences in the received signal.
本文针对新型的卫星用接收机伪码捕获的性能指标要求 ，设计了一种基于中频直接采样数字化的伪码捕获算法。
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