摘要
先分析了无线通信系统中存在码间串扰(ISI)现象,然后又从理论上分析了匹配滤波的频域和时域要求,为平方根升余弦滚降滤波器应用于消除码间串扰提供了理论依据。以16正交幅度调制(16QAM)的调制与解调为例,通过观察接收端的星座图的质量和误比特率,验证了平方根升余弦滚降滤波器能够使无线通信系统的码间串扰得到极大的改善。
This paper firstly analyzes the phenomenon of intersymbol interference(ISI)in wireless communication system,and then theoretically analyzes the frequency domain and time domain requirements of matched filter,which provides a theoretical basis for the application of square root raised cosine roll off filter to ISI elimination.Taking 16 quadrature amplitude modulation(16QAM)and demodulation as an example,it is verified that the square root raised cosine roll off filter greatly reduces the ISI of the wireless communication system by observing the quality and bit error rate of the constellation at the receiving end.
作者
徐后乐
董扬威
XU Hou-le;DONG Yang-wei(Qiyuan Laboratory,Beijing 100854,China)
出处
《舰船电子对抗》
2023年第2期102-104,120,共4页
Shipboard Electronic Countermeasure
关键词
码间串扰
匹配滤波
平方根升余弦滚降滤波器
intersymbol interference
matched filtering
square root raised cosine roll off filter
