Introduction Basic signal properties(dc, rms, dBm. and power) Fourier transform and spectra Linear systems and linear distortion Bandlimited signal and sampling Discrete Fourier transform · Bandwidth of signal

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现代国家系统(1) 一、现代国家与现代经济的共同作用 二、现代国家体系的两面性:残酷性与规则性 三、规则性的基础:主权国家、相互承认、被 认同的等级、频繁交往的工具、法律的框 架以及保卫共同利益的手段”力量平衡”( balance of power)的形成

The signal suffers an attenuation loss l Received power PR= PT/L Received snr=E,/No, Eb=Pr/Rb Antennas are used to compensate for attenuation loss Capture as much of the signal as possible

How to make a better device Good performance faster and less power consumed Low cost more compact and use less area

物理学名词中英文对照 功 work 功率 power 保守力 conservation force 非保守力

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