| 1. | The consistent results subject to the different observations show that the dimension of reconstructed phase space is 4 or 5 , the less noise contained in the observation the smaller dimension
分析结果一致地表明混响序列的重构相空间维数可低至4 5 ，低噪声情况下(如水池混响)取最小下限。 |
| 2. | The output components of the de - spreading correlator are analyzed and the expressions for the pf and pd of the step acquisition are given under the condition of additive white gauss noise
并在接收端噪声为加性白噪声情况下，对解扩相关器输出成分作了详细的分析，推导出了步进搜索时的虚警概率和检测概率的公式。 |
| 3. | And the output components of the despread correlator under the condition of additive white gaussian noise ( awgn ) are analyzed to derive the expressions for the false alarm probability and the detection probability
同时也对解扩相关器在接收端噪声为加性白高斯噪声情况下的输出成分进行了详细分析，推导得出大步进搜索的虚警概率和检测概率的公式。 |
| 4. | Based on these conditions , this thesis describes the methods for the blind source separation of noisy harmonic signals from rotating machine when the underlying system is underdetermined ( i . e . separation of n sources from m mixtures , when m < n )
本论文主要以“滚动轴承-转子”系统为对象,研究存在噪声情况下,当测试传感器的数量少于信号源的数量(欠确定)时,旋转机械振动信号的盲源分离问题。 |
| 5. | This paper presented m - band wavelet - based watershed image segmentation method for medical digital image . the method was based on a multiresolution application of a m - band wavelet and watershed transformation , followed by a wavelet coefficient based energy computation and region merging procedure . the results showed that the method was useful for the reduction of over - segmentation and can be applied to the segmentation of digital images
本文针对医学数字图像数据量大和噪声情况复杂的特点,结合多尺度分析理论,通过多小波图像分解、能量计算、分水岭变换和区域融合等步骤,克服了分水岭变换严重的过分割问题,实现了有意义的区域分割。 |
| 6. | Two detection methods of chirp signals are presented in the dissertation : the cyclic autocorrelation detection method and the correlation detection method of cyclic autocorrelation function . it is shown that the two methods both have an excellent performance of blind detection . the performance analyses of the two detection methods are both carried out for additive noise or multiplicative noise , and the output signal - to - noise ratio ( snr ) expressions of the two methods are also derived
通过研究提出了两种线性调频信号的检测方法?基于循环自相关函数包络的检测方法和基于循环自相关函数的相关函数包络的检测方法，两种方法均可实现信号的盲检测，有良好的检测性能，文中还分析了加性噪声及存在乘性和加性噪声情况下两种检测方法的性能，推导出了输出信噪比公式。 |
| 7. | The cyclic estimation approaches of chirp signals in additive nose or multiplicative noise are proposed , it presents a way for the parameters estimation of zero mean amplitude chirp signals . the estimation performances in the additive noise or multiplicative noise are analyzed by the first order perturbation analysis method , and the error variance expressions of the parameters estimation under large samples are derived
针对加性噪声情况及存在乘性噪声的情况，提出了线性调频信号参数的循环平稳估计方法，解决了零均值乘性噪声的信号参数估计问题，并采用一阶扰动分析方法，对两种噪声情况下的估计性能进行了分析，推导出了各参数的估计误差方差公式。 |
| 8. | The one - dimension effective fpk equation of colored noise serves as our starting point to evaluate the effect of noise color on communication system design . the theory of ber versus input snr per bit is developed and a new procedure to determine the system parameters that influence the minimum ber is proposed . it is shown that the communication system ' s performance is related to the turnable system parameters as well as the noise correlation time
在指数相关高期色噪声情况下，本文以一维有效色噪声fpk方程作为研究的出发点，理论分析了限带高斯色噪声信道中脉冲幅值调制数字信号传输的误码性能，给出了非线性接收器的接收性能曲线，充分体现了噪声相关时间的影响。 |
| 9. | 3 ) for weak noise interferogram or filtered interferogram , dyadic wavelet can be used to detect fringe edges . a gvf snake model was used to link discrete edges , the linked edges were kept well accordance with fringes of phase map . 4 ) phase unwrapping algorithm based on edge detection is suitable to well separated fringes , the unwrapped phase can be rewrapped to the original phase map
4 ）对于低噪声情况下或滤波后的干涉条纹图，在基于边缘检测的相位解缠过程中，利用snake模型可以高效准确的实现边缘点的连接，所连接的边缘线与干涉条纹很好的吻合，可将连线的精度控制在三个像元。 |
| 10. | Abstract : all three types of transmultiplexer are explained from the view of filter banks . addtionally , an optimal algorithm for the analysis filter banks is proposed under the environment of additive white gauss noise ( awgn ) . the analysis filter banks derived from the algorithm can match the spectrum characteristics of the input siganls
文摘:从滤波器组的角度出发，对多路复用通信方式进行了解释，同时给出了高斯加性白噪声情况下分析滤波器组的最优求解方法，通过该方法得到的分析滤波器组能够较好地跟踪输入信号的谱特性。 |
