摘要
现有的自由空间光通信降噪方法,存在降噪效果差的缺陷,无法满足自由空间光通信的需求,为此提出基于误差校正的自由空间光通信降噪方法。通过A/D转换器预处理光通信信号,以预处理完成的光通信语音信号为基础,通过傅里叶变换算法分析语音信号的频域,根据频谱分析结果,分类光通信信号噪声,并确定噪声频率。基于上述噪声分类以及频率确定结果,利用自适应处理算法为光通信降噪,通过误差校正算法补偿信号误差,成为接收终端可以接收的信号,实现基于误差校正的自由空间光通信降噪。通过测试结果表明,与现有的自由空间光通信降噪方法相比较,提出的自由空间光通信降噪方法极大地提升了降噪效果,充分说明提出的自由空间光通信降噪方法具备更好的性能。
The existing free space optical communication noise reduction methods have the defects of poor noise reduction effect,which can not meet the needs of free space optical communication.Therefore,a noise reduction method based on error correction is proposed.The optical communication signal is preprocessed by A/D converter.Based on the preprocessed optical communication speech signal,the frequency domain of the speech signal is analyzed by Fourier transform algorithm.According to the result of spectrum analysis,the noise of the optical communication signal is classified and the noise frequency is determined.Based on the above noise classification and the result of frequency determination,the adaptive processing algorithm is used to reduce the noise of the optical communication,and through the error The correction algorithm compensates the signal error and becomes the signal that can be received by the receiving terminal,and realizes the free space optical communication noise reduction based on error correction.The test results show that compared with the existing free space optical communication noise reduction method,the proposed free space optical communication noise reduction method greatly improves the noise reduction effect,which fully shows that the proposed free space optical communication noise reduction method has better performance.
作者
杨熠
YANG Yi(Wuhan Guangxun Technology Co.,Ltd.,Wuhan 430074,China)
出处
《电子设计工程》
2020年第23期120-124,共5页
Electronic Design Engineering
基金
国家自然科学基金(61875183)。
关键词
误差校正
自由空间
光通信
降噪
噪声
error correction
free space
optical communication
noise reduction
noise
作者简介
杨熠(1995-),男,湖北武汉人,硕士研究生。研究方向:光通信与光器件。
