摘要
为了便于通信、多媒体、雷达等领域的数字信号处理,解决混叠信号分离问题,设计一种数字化正交解调的信号分离装置。通过扫频找到接收信号的主要频点,通过生成主要频点的正交信号对原始信号进行处理,实现对混叠信号的有效分离。搭建FPGA处理模块,数字信号处理以XC7A35T-1FTG256I芯片为核心,取得较广采样频率范围与较高处理效率。不失普遍性,考察了双路正弦信号、正弦信号和三角信号、双路三角信号的分离,通过示波器观察到分离后的信号符合预期。经计算,频率平均精确度达到97%以上。
In order to facilitate the digital signal processing in the fields such as communication,multimedia and radar,and to solve the problem of separating the aliasing signals,a signal separation device using the digital orthogonal demodulation was designed.The main frequency points of the received signals were found by frequency sweeping,and the original signals were processed by generating orthogonal signals of the main frequency points,thus realizing the effective separation of aliasing signals.The FPGA processing module was built,and the digital signal processing took the XC7A35T-1FTG2561 chip as the core,as to achieve a wide sampling frequency range and high processing efficiency.Without losing generality,the separations of two-way sinusoidal signal,sinusoidal-triangular signal and two-way triangular signal were investigated respectively,and the separated signals observed by the oscilloscope met the expectation.By calculation,the average accuracy of frequency reaches above 97 percent.
作者
周元翰
黄明
杨杰
姜超
蓝浩宇
郭宇航
ZHOU Yuanhan;HUANG Ming;YANG Jie;JIANG Chao;LAN Haoyu;GUO Yuhang(College of Information,North China University of Technology,Beijing 100144,China)
出处
《工业技术创新》
2023年第5期116-121,共6页
Industrial Technology Innovation
关键词
正交解调
信号分离
数字信号处理
FPGA
正弦信号
三角信号
Orthogonal Demodulation
Signal Separation
Digital Signal Processing
FPGA
Sinusoidal Signal
Triangular Signal
