实验九 QPSK信号调制解调 【实验目的】 加深移动通信系统中调制解调的理解； 能够使用Matlab（或者C语言）进行通信系统调制解调基带仿真，并进行性能分析； 【实验内容】 使用Matlab（或者C语言）仿真QPSK调制解调过程； 比较发送端星座图以及不同 ...

This chapter is dedicated to the signal modulations in backscatter communications and their associated hardware realization. It introduces the basic principle of backscatter modulation and discusses ...

but understanding the electronics behind modulation and demodulation of an FM signal can be confusing. We’ve covered the basics before, but FM is so tightly associated with broadcast radio ...

LoRa is a form of “chirp spread spectrum” modulation. The “chirp” signal sweeps smoothly across specific frequency range: usually 125 kHz, 250 kHz or 500 kHz wide. How long the sweep takes ...

2023年电子设计大赛D题，对任意调制信号的判断和测量。 思路 将6种调制信号分为模拟调制和数字调制 。 思路验证 通过Matlab对采集数据直接进行频谱分析和仿真验证。 调制信号的采集： 通过FPGA的AD模块采集信号并通过FIFO传给Uart。 信号的处理： STM32H750通过Uart ...

A research team has achieved multilevel spin-based modulation of magnetoresistance in high-performance organic spin valve ...

For example, in AM radio, the voltage (amplitude) of a carrier with a fixed center frequency (the station's channel) is varied (modulated) by the analog audio signal.