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信号展宽
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  “信号展宽”译为未确定词的双语例句
     Based on the previous results on the spatial correlation characteristics of some typical land clutter, and in accordance with the specialty of pseudo random code CW (PRC -CW) radar, i.e., the time spread of echo signal under the condition of low grazing angle, a superposition algorithm was used to get real clutter echo of PRC -CW radar. The correlation characteristics of land clutter for PRC -CW radar was investigated with simulation method.
     在分析典型地物杂波的空间分布特性的基础上,针对PRC-CW(伪码调相连续波)雷达的特性,即雷达在低俯视角情形时地面回波信号展宽,利用对码元回波复信号进行空间矢量叠加以得到PRC-CW雷达实际接收的回波信号.通过计算机模拟得到伪码调相连续波雷达回波信号后,对其空间相关特性进行了分析.
短句来源
     In the design, the narrow pulse is expanded into 100μs square wave in its peak, in order to measure altitude of the pulse and sample continously for a long time. The sample is controlled by base signal or itself. The base signal or reflective wave signal is expanded into 5~50μs square wave and the sample is triggered by its rise edge.
     针对测量窄脉冲信号幅值及实现不间断连续采集过程的使用目的 ,将窄脉冲回波信号的峰值展宽成 10 0 μs的方波 ,以系统设置的发射基准信号或回波信号自身作为采集的同步控制信号 ,并将基准信号展宽为 5~ 50 μs的方波 ,以其上升沿触发采集 ,实现发射与采集同步 ,提高了采集存储的有效性 ;
短句来源
     When the modulation frequency was lower than 100 kHz and the frequency tuning amplitude was 5 V, a widened beat signal could be observed, which gave a PZT tuning coefficient over 1 MHz/V. If the modulation frequency was much higher, such as higher than 100 kHz, the beat signal became unstable and shifted obviously. The shape of the beat signal changed too.
     当调制频率小于 10 0kHz时 ,对压电陶瓷施加峰值为 5V的正弦调制信号 ,可观测到大于 10MHz的马鞍形展宽拍频信号 ,对应的PZT调谐系数大于 1MHz/V。 当调制信号频率过高时 ,例如频率大于 10 0kHz,拍频信号变得非常不稳定 ,说明激光频率产生了明显的漂移 ,且拍频信号展宽的形状也发生了变化 ,拍频信号的中心部分由凹陷变为凸起。
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  相似匹配句对
     Signal transduction of ataxia-telangiectasia
     AT的信号传导
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     New method to realize remote signal measure
     信号遥测方法
短句来源
     Sample signal was processed through spreading and amplifying and it was displayed.
     样品信号经过展宽、放大、处理后进行显示。
短句来源
     On Grade Crossing Control of City Road by Canalized Width Signal
     渠化展宽信号控制城市道路平面交叉口的探讨
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短句来源
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  signal broadening
Signal broadening in potential modulation differentiation
      
The association of cations with individual phospholipids was indicated by31P chemical-shift changes, signal broadening, signal quenching or a combination of these.
      
A method of scrubbing chloroform/methanol extracts with potassium acid phosphate overcomes adverse signal broadening from the mineral component, permitting eleven sediment phospholipids to be determined at the quantitative level.
      
Due to excessive signal broadening, uniform13C-labelling seems to have limited application inin vivo fatty acid studies.
      
The data are relatively free of noise, signal broadening, and bias effects.
      
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  broadened signals
Addition of 0.6?mmol L-1 HSA to the NFA buffer solution caused splitting of the CF3 signal into two broadened signals, shifted to the lower fields of 14.56 and 15.06?ppm, with an approximate intensity ratio of 1:3.
      
Improved HSQC experiments for the observation of exchange broadened signals
      
Broadened signals are observed at room temperature in the1H and13C NMR.
      


It is pointed out that the raining,also an object in the air,will cause the time spread of radar echo signal. For the phase-modulated pseudo-random code continuous wave (PRC-CW) radar working with continuously transmitting and receiving EM wave .the echo signal at a specified moment will be the superposition of those spreading in a period of time before the specified moment. A superposition algorithm to calculate the CW radar echo signals is proposed. Based on the former previous results on the characteristics...

It is pointed out that the raining,also an object in the air,will cause the time spread of radar echo signal. For the phase-modulated pseudo-random code continuous wave (PRC-CW) radar working with continuously transmitting and receiving EM wave .the echo signal at a specified moment will be the superposition of those spreading in a period of time before the specified moment. A superposition algorithm to calculate the CW radar echo signals is proposed. Based on the former previous results on the characteristics of rain clutter,the amplitude fluctuation and the spectrum of the echo of the pseudo-random code CW (PRC-CW) radar are investigated with simulation method.

分析了降雨这种空中体目标要引起雷达回波信号展宽的事实,对于连续发射和接收的伪码调相连续波雷达来讲,某一时刻的回波信号将是此前一段时间内展宽的回波在此时刻的迭加,提出了计算连续波雷达回波信号的迭加方法,在以往对雨杂波特性研究结果的基础上,模拟研究了该连续波体制下雷达雨杂波的幅度起伏特性和频谱特性,从而可以指导该体制雷达系统的优化设计以及该体制雷达信号处理的设计.

Based on the previous results on the spatial correlation characteristics of some typical land clutter, and in accordance with the specialty of pseudo random code CW (PRC -CW) radar, i.e., the time spread of echo signal under the condition of low grazing angle, a superposition algorithm was used to get real clutter echo of PRC -CW radar. The correlation characteristics of land clutter for PRC -CW radar was investigated with simulation method.

在分析典型地物杂波的空间分布特性的基础上,针对PRC-CW(伪码调相连续波)雷达的特性,即雷达在低俯视角情形时地面回波信号展宽,利用对码元回波复信号进行空间矢量叠加以得到PRC-CW雷达实际接收的回波信号.通过计算机模拟得到伪码调相连续波雷达回波信号后,对其空间相关特性进行了分析.

In this article, the specialt y of pseudo-random code CW(PRC-CW) radar was firstly discussed, then we analyzed the statistical characteristics of some typical land clutter. In accordance with the problem of time spread of echo signal under the condition of low grazing angle, we proposed a superposition method to get real clutter echo of PRC_CW radar.Through the computer simulation, we find out the model of pdf (probability density function) after superposition.

本文首先论述了伪码调相连续波雷达的特殊性,然后分析了一些典型地物杂波的统计特性,在此基础上,针对伪码调相连续波雷达在低俯视角情形时回波信号展宽的问题,提出了对码元回波幅度进行空间矢量迭加以得到实际回波信号的方法,通过计算机模拟,得到了迭加时实际回波的概率密度分布模型.

 
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