通过PLL实现AFC技术。
2021-06-15 09:01:58
2.26MB
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Introduction: radar electronic backscattering; radar signals; radar ambiguity function and matched filter; synthetic aperture radar imaging. Time-frequency transforms: linear transforms; bilinear transforms. Detection and extraction of signal noise: time-varying frequency filtering; SNR improvement in time-frequency domain; CFAR detection in joint time-frequency domain; signal extraction in joint time-frequency domain. Time-frequency analysis of radar range profiles: electromagnetic phenomenology embedded in backscattered data; time-frequency representation of range profiles; application of high-resolution time-frequency techniques to scattering data; extraction of dispersive scattering features from radar imagery using time-frequency processing. Time-frequency based image formation: radar imaging of moving targets; motion compensation; time-frequency based image formation; radar imaging of manoeuvring targets; radar imaging of multiple targets. Motion compensation in inverse synthetic aperture radar imaging using time-frequency techniques: motion compensation algorithms; time-frequency based motion compensation; motion compensation examples of simulated and measured data; presence of three-dimensional target motion. Synthetic aperture radar imaging of moving target: radar signatures of moving targets; effect of target motion on SAR imaging; detection and imaging of moving targets; SAR imaging of moving targets using time-frequency transforms. Time-frequency transform for analysis of micro-doppler phenomena: vibration induced micro-doppler; rotation induced micro-doppler; examples. Trends in time-frequency transforms for radar applications
2021-06-10 11:21:13
6.16MB
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本方法旨在评估用于电气设备的部件。它的目的是确定部件承受中度至重度振动的能力，这些振动是由运输或现场操作产生的运动结果。这种类型的振动可能会干扰操作特性，特别是如果重复的压力导致疲劳。这是一项用于部件鉴定的破坏性试验。它通常适用于空腔型封装。
2021-05-29 11:01:48
68KB
rolling-bear-fault-diagnosis-based-wavelet-time-frequency-map-and-CNN
The wavelet time-frequency map is obtained from the original vibration signal, and then input into CNN to realize fault diagnosis, the test set has the highest diagnostic accuracy
在matlab和pytorch0.4下，通过matlab对原始振动信号求取小波时频图，然后输入进pytorchCNN实现故障诊断，测试集诊断精度最高达99.5%。代码出售的、出售的、出售的，需要的加qq2919218574.详细见我的博客：
小波时频数据为：链接: 提取码: xhqz
2021-05-29 10:12:30
1KB
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A transistor-level, design-intensive overview of high speed and high frequency monolithic integrated circuits for wireless and broadband systems from 2 GHz to 200 GHz, this comprehensive text covers high-speed, RF, mm-wave, and optical fibre circuits using nanoscale CMOS, SiGe BiCMOS, and III-V technologies. Step-by-step design methodologies, end-of chapter problems, and practical simulation and design projects are provided, making this an ideal resource for senior undergraduate and graduate courses in circuit design. With an emphasis on device-circuit topology interaction and optimization, it gives circuit designers and students alike an in-depth understanding of device structures and process limitations affecting circuit performance.
Table of Contents
Chapter 1 Introduction
Chapter 2 High-frequency and high-data-rate communication systems
Chapter 3 High-frequency linear noisy network analysis
Chapter 4 High-frequency devices
Chapter 5 Circuit analysis techniques for high-frequency integrated circuits
Chapter 6 Tuned power amplifier design
Chapter 7 Low-noise tuned amplifier design
Chapter 8 Broadband low-noise and transimpedance amplifiers
Chapter 9 Mixers, switches, modulators, and other control circuits
Chapter 10 Design of voltage-controlled oscillators
Chapter 11 High-speed digital logic
Chapter 12 High-speed digital output drivers with waveshape control
Chapter 13 SoC examples
Appendix 1 Trigonometric identities
Appendix 2 Baseband binary data formats and analysis
Appendix 3 Linear matrix transformations
Appendix 4 Fourier series
Appendix 5 Exact noise analysis for a cascode amplifier with inductive degeneration
Appendix 6 Noise analysis of the common-emitter amplifier with transformer feedback
Appendix 7 Common-source amplifier with shunt-series transformer feedback
Appendix 8 HiCUM level 0 model for a SiGe HBT
Appendix 9 Technology parameters
Appendix 10 Analytical study of oscillator phase noise
Appendix 11 Physical constants
Appendix 12 Letter frequency
2021-05-25 23:43:25
21.5MB
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