The efficiency of the error - based detecting method when it is used to detect dsss signal in chaotic noise is analyzed theoretically , and simulations are carried out to show its feasibility and efficiency . 4 从理论上分析了用于检测周期信号的基于混沌噪声模型的误差检测方法,对检测混沌噪声中的直扩信号同样有效,并通过仿真实验证实了这种误差检测方法用于检测微弱直扩的可行性和有效性。
Although the algorithm derived in the paper is originally designated to the fault recording data , it certainly can also be used to compress those data that has the same characteristics , such as the data of the periodic signal or the images with only sixteen - color index 虽然本文的讨论及研究工作主要是针对故障录波数据的，但文中所提出的算法却能很好地适用于具有类似特征的周期信号的编码，以及广泛存在的16色图像数据的压缩。
The software and hardware design of portable digital testing equipment based on tms320vc5510 are presented , which is the newly efficient and low power consuming dsp of ti corporation . the system realizes the requirement of sample theorem when sampling the wide spectrum signal with an equivalent sample technology , integrates the lcd control core in cpld and makes cpld as lcd controller instead of specific lcd controller , and makes the colorful stn - lcd as terminal displaying facility . the system suits the development requirement of the new portable digital testing equipment with the specialities of low power consuming , high integration and good displaying interface 本文介绍了以ti公司新一代高效率、低功耗数字信号处理器tms320vc5510为核心实现的便携式测试设备的软硬件设计，以等效采样技术实现采样宽频谱周期信号对采样定理的要求，在cpld内集成完整的lcd控制核代码，并以cpld作为lcd控制器取代专用控制器，以stn彩色lcd作为终端显示设备，该方案具有功耗低、集成度高、良好的人机接口等特点，适合新一代便携式测试设备的发展需求。
Based on the theory and knowledge , the paper proposes and discusses several robust detectors in detail , such as optimal periodical signal detectors which exploits the prior knowledge that the chi _ square distribution hypothesis test has certain robustness , detectors based on over _ sampled gabor representation for transient signals detection which takes the numerical computational advantage of robustness brought by over _ sampling , and the detector using computer _ intensive method " bootstrap " 在此基础上，详细讨论几种具有一定robustness的检测器，即，基于具有robustness的卡平方假设检验的周期信号检测方法、利用过采样的gabor表示的暂态信号检测方法以及基于计算机强大计算功能的统计学方法bootstrap技术。
Secondly , the chaos and hyperchaos of drefl is successfully controlled by three methods - period - parameter - modulation , delay nonlinear - feedback parameter - modulation and outer - period - signal - drive . the latter two methods are new methods that we present based on original methods for control chaos and considering the character of drefl , the results of controlling the chaos and hyperchaos of drefl is satisfying 其中，非线性延时反馈参数调制法和外部周期信号驱动法是我们在已有的控制混沌的基础上，并结合双环掺铒光纤激光器的自身特点而提出的两种新方法，这两种方法的控制效果是令人满意的。
The statistic of wavelet transform coefficient algorithm can solve the periodic noise , high - energy noise and some non - gauss noise simply and effectively ; bi - spectrum can acquire more information from the original signal than power - spectrum , detect more information except from range and restrain the gauss noise . short - time speech signal can be considered as stationary and with periodic non - gauss signal , so we can make use of bi - spectrum to obtain the speech character and separate the speech and noise and detect morse telegraph signal ; complex number spectrum variance algorithm is put forward based on the deeply observing speech data , it is a new algorithm , experiment show that it is simple , effective 统计算法在解决周期信号、高能噪声和高斯信号方面有独特之处,能简单有效提取以上噪声的特征;双谱能够提供比功率谱更多的有用信息,有效地检测信号幅度之外的其它信息,并能有效抑制高斯噪声,短时语音信号一般认为是平稳且有一定的周期性的非高斯信号,因而可以利用双谱来提取语音信号特性并实现信噪分离;复数谱方差算法是在对语音信号进行深入观察和分析的基础上而提出来的一种全新的语音特征提取方法,此方法简单而有效的提取了语音、噪声的特征以及检测莫尔斯信号,基于实验表明,该算法取得了很好的效果。
