功率谱密度

• By solving the stochastic differential equations describing the noise performance of the cmos gilbert mixer , the time - varying power spectral density of its output noise at high frequencies is given
  通过求解描述cmosgilbert型混频器噪声性能的随机微分方程，本文给出了该类型混频器高频输出噪声的时变功率谱密度。
• Studies have been made on arithmetic realization of apsd estimate in a high - speed detect system , since the way of calculating cpsd is only a little different from that of calculating apsd
  鉴于互功率谱密度估计算法只需将自功率谱密度估计算法中的自协方差函数换成互协方差函数,本文仅研究和讨论了自功率谱密度估计算法及其实现。
• Research on wind is the precondition of wind response , then the section plane of static wind , intensity of onflow , psd function and correlativity of dynamic wind are involved in
  对风的研究是进行风振响应研究的前提,风的基本特征包括平均风速剖面、湍流强度、脉动风功率谱密度函数、脉动风的空间相关性以及极端风速的概率统计特性。
• The power spectral densities which existed in the form of power law are used to determine the parameters of the power spectral densities in the rational form . the computer simulation for the models is also carried out
  对路面时域模型的建立，通常需要路面功率谱密度的表达式为有理函数的形式，而国标中所推荐的功率谱密度为幂函数形式。
• In order to limit such mutual interference , the operators of the adjacent satellites will follow the radio regulations by itu , to take appropriate measures and limit the power density of the carriers , as well as the antenna size
  为了限制相互之间的干扰，两颗邻星的操作者会按照国际电联制订的《无线电规则》 ，对载波功率谱密度和地面天线口径作适当的限制。
• The whole emulation platform also includes a user ’ s interface , which was developed by using vc + + 6 . 0 , and a serial communication module that connects dsp and pc . the software for emulation is the most important part in this thesis
  软件系统方面,首先设计了以dsp软件流程为核心的软件系统,在dsp开发环境ccs ( codecomposerstudio )下完成了各种功率谱密度估计算法的仿真。
• Simulink and analysis about balanced gold code from correlation and power spectrum density curve are processed . at the same time , simulink experiment of ber performance on the base of theory analysis using designed spread spectrum system model
  在码序列的互相关性和功率谱密度分布上对平衡gold码进行了仿真和分析，同时在构建的扩频系统上对理论分析进行了误码性能的仿真。
• The work covers the new algorithm investigation , the improvement of random number generation and the simulations coming on the pwm appearance , the power spectra , the random number generation model and the power system output
  基于对随机空间矢量pwm算法及其功率谱密度的研究，开发出完整的空间矢量pwm仿真软件，通过vc + +凋用matlab引擎函数库实现fft ( fastflouriertransformation ) 。
• Since uwb technology has a lot of advantages such as high date rate , low power spectral density , high precision location identification and inherently exceptional multipath immunity , it has become the research focus in the wireless communication field
  超宽带( uwb )通信具有数据速率高、功率谱密度低、定位精度高以及抗多径能力强等优点,已成为短距离无线通信领域研究与开发的热点。
• On the basis of the theory about wheel / rail noise , the paper analyses the mechanism of wheel / rail noise and the relationship between rolling noise and vibration of railway track components , and describes a way to reduce the vibration energy by enhancing the elasticity of track
  运用轨道部件的振动加速功率谱密度函数与轮轨噪声功率谱密度之间的关系，分析了轨道结构弹性对降噪的作用。