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- low signal and noise ratio 低信噪比
- How to detect the LPI radar signal and estimate the signal parameters in low signal to noise ratio condition is very important in modern Electronic Warfare (EW). The research in this field is belongs to the frontier of EW technology. 如何在低信噪比下检测LPI雷达信号并进行参数估计在电子战中具有重要的意义,这方面的研究至今属于电子战的前沿课题之一。
- signal and noise ratio(SNR) estimation 信噪比估计
- Used in low signal and time constant circuits. 适用于低信号电路、时间常数电路。
- Raw thermal images acquired by pulsed thermography (PT) usually have low signal noise ratio (SNR) and temperature contrast. 摘要脉冲热像检测中直接获取的原始热像往往信噪比较低、对比度较差。
- In low Signal to Noise Ratio (SNR) range, the close-form expression of the optimal BFV is derived. 在低信噪比区域,求出了最优波束成形向量的闭合解;
- This estimator has the advantage of high accuracy even on low signal to noise ratio conditions, but its implementation is relatively simple. 这种频率跟踪方法的优点是即使在很低的信噪比下仍然能获得高的跟踪精度,且实现相对简单。
- We also compare the performance of signal and noise s WT at difference scale. 这种奇异性识别技术在信号的特征提取和消除噪声方面有广阔的应用前景。
- This paper presents a structure based on noncoherent-SPRT algorithm for the sequence acquisition under large frequency offset and low signal to noise ratio in DS/SS systems. 该文研究大频偏低信噪比情况下DS/SS系统中的序列捕获问题,介绍了一种基于非相干序贯检测算法的捕获结构。
- Numerical results show that for the data with either high or low signal to noise ratio (SNR), inversion solution depends weakly on regularization operators, while strongly upon regularization parameter. 模拟表明,无论是高信噪比数据,还是低信噪比数据,反演的含水量在小正则化参数时,对模型约束的依赖性不大,主要受正则化参数影响。
- signal and noise ratio 信噪比
- Experiments show that using active electrode can improve ratio of signal and noise, reduce noise and detect surface EMG signal effectively. 实验表明,采用有源电极可以提高信噪比,减小噪声,有效地提取出表面肌电信号。
- If a signal has a lot of hiss and noise in stereo but is quiet in mono, multipath is usually the cause. (Low signal strength or interference can cause similar symptoms. 如果信号有很多嘘声和噪声在立体音响但是安静在单音,多重通道的通常是起因。(低信号强度或干涉可能导致相似的症状。
- An algorithm based on the Haar wavelet transform(HWT) was developed for blind estimates of pseudo-random code(PC) rates and symbol periods of direct sequence spread spectrum(DS/SS) signals in low signal to noise ratio environments. 为解决低信噪比下直扩信号的参数估计问题,提出了一种基于H aar小波变换实现直扩信号伪码(PC码)速率和符号周期盲估计的新型算法。
- The profit signal and noise vectors are orthogonal to each other, so the variation vector is the hypotenuse in a right triangle. 有效信号适量和噪声信号适量相互正交,所以变量矢量是直角三角形的斜边。
- The problem was that DAMA does not use multiple detectors to discriminate between signal and noise. 问题在于:DAMA实验并未使用多重探测器来区分讯号与杂讯。
- Myeloma(1 case),lymphomas,and metastasizes showed low signal and relatively high signal on T 1WI and T 2WI respectively. Another myeloma showed high signal on T 2WI. 骨髓瘤 (1例 )、淋巴瘤和转移瘤在T1 WI和T2 WI分别呈略低信号和较高信号 ,1例骨髓瘤在T2 WI呈较高信号。
- Fortunately, the past year has seen the publication of a series of results that help to disentangle signal and noise. 令人欣喜的是,去年,已经有一系列的探测结果发表,帮助我们分析各种迹象,解开气候变化之谜。
- A criteria for detection is derived based theasymptotical analysis of the orthogonality between signal and noise subspace. 对信号子空间和噪声子空间的正交性进行了分析得出新的估计准则。