摘要
针对室内漫射光无线通信问题,提出一种采用离散多音/正交幅度调制和空时块编码的多输入多输出(MIMO)光无线通信技术。基于离散多音/正交幅度调制技术,并通过考虑室内全光无线信道的脉冲响应和其噪声特性,建立起室内红外光无线链路的信道模型;再采用空时块编码技术,提出一种实现室内漫射光无线通信的MIMO无线通信系统,并通过分析得到接收机端重要的性能指标信噪比和误码率;仿真实验结果表明,提出的室内MIMO光无线通信技术与其他传统的技术方案相比,可以降低系统的误码率,获得更好的信噪比,降低所需要的发射光功率。
A Multiple Input Multiple Output(MIMO)optical wireless communication technology based on Discrete Multi-Tone/Quadrature Amplitude Modulation(DMT/QAM)and Space-Time Block Coding(STBC)is proposed in order to solve the problem of indoor diffuse optical wireless communication.Firstly,the channel model of indoor infrared wireless links is established based on DMT/QAM technique by considering the impulse response and noise characteristics of indoor all-optical wireless channel.Then,based on STBC technology,an MIMO wireless communication system for indoor diffuse optical wireless communication is proposed,and the important performance indicators,namely Signal-to-Noise Ratio(SNR)and Bit Error Rate(BER),at the receiver are obtained by analysis.The experimental results show that the proposed indoor MIMO optical wireless communication technology can not only reduce the BER for the system,but also obtain a better SNR compared with other traditional schemes,thus reducing the required optical transmitting power.
作者
乔琪
周湘贞
QIAO Qi;ZHOU Xiangzhen(School of Computer and Communication,Jiangsu Vocational College of Electronics And Information,Huaian Jiangsu 223003,China;School of Computer Science and Engineering,Beihang University,Beijing 100191,China;Department of Information Engineering,Shengda Economics Trade&Management College of Zhengzhou,Zhengzhou Henan 451191,China)
出处
《太赫兹科学与电子信息学报》
2021年第1期42-48,共7页
Journal of Terahertz Science and Electronic Information Technology
基金
淮安市自然科学研究计划资助项目(HAB201912)
国家自然科学基金面上资助项目(61672077)
河南省重点研发与推广专项基金资助项目(182102110277)。
关键词
离散多音/正交幅度调制
光无线系统
空时块编码
多输入多输出
光功率
误码率
Discrete Multi-Tone/Quadrature Amplitude Modulation
optical wireless system
Space-Time Block Coding
Multiple Input Multiple Output
optical power
Bit Error Rate
