signal duration

It increases the signal duration , effectively restrain the interference between the symbols .

它增加了信号持续时间，有效抑制了符号间干扰。

The results show that the signal of a high number of cycles is usually of the narrow band and conducive to the frequency control , more number of cycles , and long signal duration in time , and the waveforms are easily superimposed .

结果表明：周期数目高的信号，频带窄，有利于频率控制周期数多，在时域内信号持续时间长，波形易叠加，一般折中选择。

Differential threshold of sound signal duration in relation to signal duration

声音信号的时程辨别阈与信号时程的关系

In the discussion the role of signal duration in vowel identification and in pitch differentiation was compared .

文中比较了信号时程的长短在元音识别中及在声音音调辨别中的不同作用，并讨论了差异的原因。

When the data rate is more than several Mbps , there is ISI because the signal duration is shorter than the channel delay spread .

在高达几兆bps的传输速率下，传输符号的符号周期小于信道的时延扩展，从而产生ISI。

It must be pointed out that the signal duration magnitude , MD , shows a tendency of saturation when the magnitude is greater than 4.8 . In that case satisfactory results may be obtained by using another fitting equation with a greater slope .

必须指出，持续时间震级MD在震级大于4.8时可产生震级饱和现象，对此，用另一条具有较大斜率的方程拟合便可得到满意的结果。

A pulse width modulation ( PWM ) circuit adopting direct digitizing strategy is presented . It modulates little resistance or capacity signal into pulse duration ratio , thus A / D conversion is implemented .

介绍一种采用直接数字化方案的脉宽调制（PWM）电路，它可把微小的电阻或电容信号调制成脉冲的占空比，从而实现A/D转换。

Under 23 ℃ and 86 % RH , flying male adults emit flash signal with flash duration 0.52 s , interval 0.28 s , and flash intensity peak of 0.6 lx .

室外观测发现，在23℃、86%RH时，雄萤飞行求偶闪光信号脉冲闪光持续时间为0.52s，间隔时间为0.28s，闪光信号的最大亮度为06lx；

Anew approach , named Modified Fast Fourier Transform ( MFFT ), is proposed to analyze the components of a periodic signal when sampling duration is not equal to an integer multiple of the fundamentals .

提出了一种改进的快速付立叶变换（MFFT）的计算方法，在采样的持续时间不是信号周期整数倍的条件下，能够准确地提供此信号中各周期分量的特性。

The method of Modified Fast Fourier Transform ( MFFT ) can be used to compute the exact characteristics of the components of a periodic signal when sampling duration is not equal to an integral multiple of the fundamental .

改进的快速富里叶变换的计算方法能够在采样的持续时间不是信号的周期的整数倍时，准确地提供此信号中各周期分量的特性。

Besides designing and selecting waveforms , in order to acquire high time bandwidth product , it is the major practical method to increase the bandwidth of the signal with limited time duration .

除了对波形本身的设计和选择，设法增大有限时宽信号的带宽，是实际获得大时带积脉压信号的主要手段。