Modern digital technology has made it possible to manipulate multi-dimensional signals with systems that range from simple digital circuits to advanced parallel computers. The goal of this manipulation can be divided into three categories: R

This the book "Signals and Systems - made ridiculously simple" by J. Karu in djvu file format. It gives an excellent introduction to system theory and covers all related concepts: Continuous-Time Systems, Frequency Domain, Laplace Transform, Continuo

这些是信号与系统中用到matlab的各种那个仿真实例，可用作编程中的现成模板。-These are the signals and systems used in all the simulation matlab, ready-made templates can be used as programming.

Millimeter wave (mmWave) signals experience orders-of-magnitude more pathloss than the microwave signals currently used in most wireless applications. MmWave systems must therefore leverage large antenna arrays, made possible by the decrease in wave