frequency of signal meaning in English
信号频率
Examples
- When the frequency of signal is below to kilohertz quantitatively , the preactical test results of this system indicated that it is efficiency in signal process of biomedicine , automatic control , and audio etc . the purpose of design has been realized by the system ultimately
实际测试结果表明，该系统对于处理khz数量级以内的生物医学信号、自动化控制信号以及音频信号的效果基本达到了预期的设计要求。 - It was indicated that the major frequency of signals for three different motivating manners concentrated between 20 and 50 khz , the difference between wavelet coefficients was small , and the pertinence of the original signal and the returning signals was low
最终结果表明,从频谱上来讲,三种激励方式所产生信号的主频集中在20 50khz ,小波系数相差甚微,并且来源于同一源的接收信号与源信号相关程度也不高。 - For those biological signals like echo of bat or whale , as well as man - made system signals like radar or sonar signal , the instantaneous frequency of signal component contains important information and could be used for signal model parameters extraction . so that the proper choose of transformed domain and signal characteristic extraction method is of crucial important . the ridge extraction method used for signal characterization was first proposed in the 1990s , it ' s based on the study of the phase of the wavelet ( or other linear ) transform
对于许多实际的信号，如蝙蝠发出的超声波、鲸鱼的叫声等生物信号，以及雷达、声呐等人造系统产生的信号而言，信号瞬时频率的变化规律反映了信号重要的特征，并且也是信号模型中关键的参数，因此选择合适的变换域提取信号的瞬时频率信息，并选择合适的方法对信号进行重建是很重要的问题。 - The butterworth wavelet filter with good magnitude - frequency characteristics is adopted to process the vortex flow signal , and the fundamental frequency of signal is estimated effectively . the algorithm is implemented in a digital signal processing system based on a tms320vc5409 dsp chip , and its effectiveness is proved
采用幅频特性较好的iir型butterworth小波滤波器，处理涡街流量信号，估计基频，并在以tms320vc5409为核心的涡街流量计数字信号处理系统上实现，证明其方法的有效性。 - The signal generator is based on dds ( direct digital synthesize ) , the maximal frequency of signal is 5mhz , the minimal frequency is 100hz , its minimal resolution is 4 . 77hz ; in the module of data acquisition , we adopt a adc which the range of sample frequency is 100khz to 40mhz , and its resolution is 12 bits ; the most digital logic is accomplished in cpld ( complex programmable logic device ) ; the control and calculating is realized in computer , and the external hardware is communicated with computer by epp of it ; the software is programmed on the developing plat of labwindows / cvi
信号源采用直接数字合成原理实现，它所能产生的信号频率为100hz 5mhz ，最小频率分辨率为4 . 77hz ；数据采集采用了12位的adc ，最高的采样频率为40mhz ，最低的采样频率为： 100khz ；主要的数字逻辑部分采用cpld实现；控制以及计算功能在计算机内完成，硬件电路板通过计算机的epp口实现与计算机的数据传递；软件是在labwindows / cvi环境中编写的。