摘要
提出了一种采用复调制解调的方法实现最小频移键控(MSK),该方法根据输入的数据比特产生复低通信号,接着进行低通滤波、复调制从而实现MSK的复调制;对MSK输入信号进行抽样、复解调、低通滤波得到MSK的复低通信号,将复低通信号与其延迟后的共轭信号进行复数相乘并对所得到的积的虚部进行判决从而完成MSK的非相干复解调。最后还采用Matlab仿真验证了该方法的正确性和有效性。
A novel method of using complex modulation and complex demodulation to implement MSK is brought forward, according to the bit value of the input data to produce complex low-pass signal ,following the signal is low-pass filtered and complex modulated to finish complex modulation, the input MSK signal is sampled ,then complex demodulated and low-pass filtered to obtain complex low-pass signal, the signal and the conjugated of its delayed version are multiplied together, according to image part of the product to decide to finish complex demodulation.Simulation in Matlab is used to validate correctnesss and effectiveness of the method.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2008年第15期23-26,共4页
Power System Protection and Control
关键词
最小频移键控
频带利用率
复调制
复解调
非相干解调
DSP
MSK
bandwidth efficiency
complex modulation
complex demodulation
noncoherent differential demodulation
DSP
