电子器件Issue(4)：817-820,4.DOI:10.3969/j.issn.1005-9490.2015.04.020
基于FPGA的自由空间音频信号传输及频谱显示系统
Free Space Transmission of Audio Signals and Spectrum Display System Based on FPGA
杨丹 1毛昱枫 1于虹1
作者信息
- 1. 东南大学电子科学与工程学院，南京210096
- 折叠
摘要
Abstract
With the decline in the cost of equipment of free space optical communication technology,related applica-tions are also expanding. We built an audio signal transmission system based on free-space optical communications technology. One laser beam is modulated by a voice signal,and then transmited in the air. It is demodulated on a re-ceiver consisting of a phototransistor,a feedback circuit and a control model. The original audio signal is finally ob-tained by a control circuit composed of FPGA for demodulation. The system achieves FIR filtering,FFT transform and VGA timing. We have completed the system and the experimental results show that a high recognition rate,low-cost free-space audio signal transmission and spectrum display system is realized.关键词
大气光通信/音频信号传输/动态频谱显示/FPGAKey words
atmospheric optical communication/audio signal transmission/dynamic spectrum display/FPGA分类
信息技术与安全科学引用本文复制引用
杨丹,毛昱枫,于虹..基于FPGA的自由空间音频信号传输及频谱显示系统[J].电子器件,2015,(4):817-820,4.
