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利用duffing振子检测微弱信号频率的matlab程序。可以检测与周期策动力频率相差0.03之内的微弱信号频率。信噪比达到-68db-use Duffing oscillator frequency detection of weak signals in Matlab procedures. Can be detected with the cycle driven frequency difference of 0.03 within the weak signal frequency.
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The design for respiratory frequency detection circuit using thermosensor
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通过分析8PSK 调制方式的载波恢复、定时恢复算法, 提出了一种适用于新一代数字卫星电视标准DVB S2
的全数字解调算法, 改进了相位频率检测( PFD) 算法以适合于8PSK 解调. 载波恢复采用频率检测( FD) 和相位频率
检测相结合的结构, 跟踪范围超过1 倍符号率. 采用Gardner TED 算法进行定时恢复.-By analyzing the 8PSK modulation carrier recovery, timing recovery algori
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This application note describes the implementation of a dual tone multiple frequency (DTMF)tone generator and detector for the TMS320C54x . This application note provides some theoretical background on the algorithms used for tone generation a
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本文首先介绍了认知无线电的基本概念,对认知无线电在WRAN系统、UWB系统及WLAN系统等领域的应用分别进行了讨论。在此基础上,针对实现认知无线电的关键技术从理论上进行了探索,分析了影响认知网络正常工作的相关因素及认知网络对授权用户正常工作所形成的干扰。从理论上推导了在实现认知无线电系统所必须面对的弱信号低噪声比恶劣环境下,信号检测的相关方法和技术,并进行了数字滤波器的算法分析,指出了窗函数的选择原则。-The development of the wireless business resul
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经典多脊提取,通过寻找局部极值的方法来同时提取多条脊-Multiridge detection and time-frequency reconstruction
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Information of crop phenology is essential for evaluating crop productivity and crop management. Therefore we developed a new
method for remotely determining phenological stages of paddy rice. The method consists of three procedures: (i) prescr ipt
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介绍了经典的时频分布和检测理论的同时，作者利用时频分布的方法，将一
维时间信号转化到二维的时频空间中，通过提取图像的特征来判决信号和杂波，
采用的数据是使用McMaster IPIX雷达，在加拿大东海岸附近测得的。实测数据
研究表明此方法可以得到很好的检测结果。
-In this paper,we first review the time-frequency analysis and time
-frequency-based detection methods.
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本文介绍了一种复合信号测量系统，该系统基于TMS320F2808实现，用来检测和重建复合频率信号中的主次信号。该系统由计算模块、重建模块和通讯模块组成。为了能在实时运行中自适应地确定采样频率，我们采取了“eCAP+AD”的方法，eCAP模块记录下整形后的复合信号的上升沿过零点时间值并估计出主频率，从而使系统能自动地选取合适的采样频率完成AD采样过程。系统采用了4096点的FFT算法，能够实现高达0.25Hz的频率分辨率，相对分辨率达到0.05 。-This paper introduces a
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基于高阶累积量的生命微动信号检测方法的研究成果，发表在IEEE Transaction Geoscience and Remote Sensing 期刊上-The research on vital information extraction meets a
lot challenges due to the narrow bandwidth and low signal-to-noise
ratio of a vital sign in real environment. In th
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本文把小波变换应用于心电信号的识别。探讨了伸缩尺度和伪频率(译自pseudo—frequency)-~．间的关系；利用二进双正
交样条小波对室扑信号按Mallat算法进行小波分解；提出了心室扑动和心室颤动信号的小波变换识别方法-Wavelet transform in used to identify the ECG si a1．The relation between scale and pseudo—frequency is discussed．The ventrlcular
flu
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光伏孤岛效应的仿真方面的文章，主要涉及孤岛检测仿真-Photovoltaic the island effect simulation article mainly involved islanding detection simulation
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基于改进滑模频率偏移法的光伏孤岛检测研究-PV islanding detection based on improved sliding mode frequency offset
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自适应主动频率偏移孤岛检测新方法--光伏控制技术-Adaptive Active frequency offset islanding detection of a new method
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Bit Loading
The amount of bits that can be carried per channel depends upon the SNR at that particular frequency, lower SNR levels may need more power to transmit data and since each frequency is subject to an overall power limit, those frequencies
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频率细化技术在超低频/极低频电磁信号检测中的应用-Frequency refinement technique in ELF/low frequency electromagnetic signal detection
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提高目标检测通过的OFDM雷达信号频率分析-Improved Target Detection through OFDM Radar Signals Frequency Analysis
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Frequency-Domain Detection of OQPSK Signals
with Quasi-Constant Envelope and High Spectral
Efficiency
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一篇论文的源代码，包含一篇论文，源代码和一个例图-Frequency-tuned Salient Region Detection
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Abstract—In slow frequency hopping systems, it is critical
to detect, classify, and mitigate interference, as it degrades the
system performance. Generalized likelihood ratio test algorithm
was proposed for the detection of interference. Howeve
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