通信工学 ポータル
data/lecture/information/software-engineering/software-engineering-basics.lecture.n.md
1導入
このポータルでは、
2学習経路
時間領域 の信号 と周波数領域 のスペクトルを対応 づける。線形時不変 システムの周波数応答 によって、通信路 やフィルタの作用 を分析 する。変調 によるスペクトル移動 と、信号対雑音比 および帯域 の意味 を理解 する。標本化 によるスペクトルの反復 とエイリアシングを分析 し、復元条件 を導出 する。
3参照 する数学
フーリエ
Communications Engineering Portal
data/lecture/information/software-engineering/software-engineering-basics.lecture.n.md1Introduction
This portal introduces the foundations for transmitting information as physical signals and estimating that information at a receiver. The preceding software-engineering lecture addressed systems that can span multiple devices. Here, we explain the constraints imposed by channels, bandwidth, and noise when signals are transmitted between those devices.
2Learning Path
- Relate time-domain signals to their frequency-domain spectra.
- Analyze the effects of channels and filters through the frequency response of a linear time-invariant system.
- Understand spectral translation by modulation and the meanings of signal-to-noise ratio and bandwidth.
- Analyze spectral repetition and aliasing caused by sampling, and derive a reconstruction condition.
3Mathematical References
The Fourier transform connects time and frequency domains, while complex exponentials simplify calculations involving sinusoids and phase. Probability distributions describe noise probabilistically.
data/lecture/math/analysis/introduction-to-fourier-transform.lecture.n.md data/lecture/math/algebra/complex-numbers-and-complex-plane.lecture.n.md data/lecture/math/statistics/probability-distribution-basics.lecture.n.md