基于 Matlab 的 AM、DSB、SSB 信号的调制摘要:调幅,英文是 Amplitude Modulation(AM）。调幅也就是通常说的中波，范围在 503—-—1060KHz.调幅是用声音的高低变为幅度的变化的电信号。 距离较远,受天气因素影响较大，适合省际电台的广播。DSB（Double Side Band），在通信领域代表调制的一种方式，叫双边带调制。抑制载波双边带调幅方式，简称为双边带调幅，即为 DSB。这种调幅方式是在标准 AM 调幅波中去除其中的载波重量得到的，优点在于这种调幅波的发射功率在不影响信号传输的同时要比 AM 波小，节约了发射功率，但其解调电路要比 AM 波解调电路更复杂.单边带 - single side band 的缩写，就是使用电波波形的一半接收，比如用上边带或者下边带 USB LSB，剩下那一半波形因为形状是和那一半对称的，所以可以用接收机补全,上边带和下边带通讯统称单边带 SSB。利用 MATLAB 编程语言实现对 AM、DSB、SSB 信号的调制。关键词：AM DSB SSB MATLABAbstract: Amplitude Modulation, English is Amplitude Modulation （AM)。Medium wave amplitude modulation is often said, in the range 503—1060 KHZ.Amplitude modulation is changes with the amplitude of the sound level into electrical signals。Far away, are greatly influenced by the weather factors, suitable for provincial radio broadcast.DSB （Double Side Band）， in the field of communications on behalf of the modulation of a way to call Double sideband modulation。Suppressed carrier double sideband amplitude modulation, double sideband amplitude modulation for short， is the DSB。This way of amplitude modulation is in the standard AM modulated wave carrier component is taken out of it, advantage is that the amplitude modulation wave transmitted power in does not affect the signal transmission at the same time than AM wave is small， save the transmission power， but its demodulation circuit is more complex than the AM signal demodulating circuit.SSB - single side band， is the use of half wave waveform, such as us...
