Modem(Modulator&Demodulator)是一种用于调制数字信号和解调模拟信号的设备。它的工作原理是将数字信号转换为模拟信号,以便它们能够通过模拟传输线路进行传输。 Modem有两个主要部分:调制器和解调器。调制器将数字信号转换为模拟信号,以便它们可以通过模拟传输线路传输。解调器执行这个过程的逆过程,将模拟信号转换回数字信号...
4、modulation method in different SNR, making comparison of demodulation effect.Key words :matlab; modulator and demodulator;am;signal-to-noise-ratio 目录第1章 绪论11.1 研究意义11.2 研究现状11.3 研究内容2第2章 AM调制解调的原理32.1 AM的调制原理32.2 AM的解调原理42.2.1 AM波的相干解调52.2.2 AM波...
Key words :matlab;modulator and demodulator;am;signal-to-noise-ratio 第 1.1 调制就是使一个信号(如光、高频电磁振荡等)的某些参数(如振幅、频率等)按照另一个欲传输的信号(如声音、图像等)的特点变化的过程。解调是调制的逆过程,它的作用是从已调波信号中取出原来的调制信号。对于幅度调制来说,解调是从它...
This paper studies the main content is to understand the mathematical model of AM signal, the modulation method and the demodulation method of it, Different demodulation method in different SNR, making comparison of demodulation effect. Key words :matlab; modulator and demodulator;am;signal-to-noise...
7、son capability and prese nts adesig n of MQAM modulator / demodulator based on software defi ned radiowith FPGA. The characteristics and overview ofMQAM are firstly introduced, thenmathematical structures of the modulator / demodulations and carri recovery,design of software , realization of the...
AM modulator/demodulatorconfigurable analog building blocksfield programmable analog arraysIn this paper, the design of a power-law function generator and AM modulator/demodulator using configurable analog blocks (CABs) for filed programmable analog arrays (FPAAs) is presented. To maintain high frequency...
Figure 4-5 A M signal containing not only the carrier and sidebands but also the modulating signal.Figure 4-6 T he tuned circuit fi lters out the modulating signal and carrier harmonics,l eaving only the carrier and sidebands.V V c Amplitude Modulator and Demodulator Circuits 121 ...
program based on FPGA andanalysis of test results.This paper elaborate a new algorithm of 1 6QAMcarrier recovery and thedesign of experiment hardware with visualizaton.System bases on a common hardware platform and modular software design toachieve the experiment system ofMQAM modulator/demodulator. ...
aThe USART module includes an integrated modulator and demodulator which allows for wireless communication using infrared transceivers. USART模块包括考虑到无线通信使用红外收发器的一台联合调制器和解调器。[translate] aGEWAHRLEISYUNG 正在翻译,请等待... ...
The frequency of the carrier in the correspondingDSB AM Modulator Passbandblock. Initial phase (rad) The initial phase of the carrier in radians. Lowpass filter design method The method used to generate the filter. Available methods are Butterworth, Chebyshev type I, Chebyshev type II, and Ellip...