【作者】 李敏；

【导师】 彭张节； 王明高；

【作者基本信息】 上海师范大学 ， 电子与通信工程（专业学位）， 2019， 硕士

【摘要】 论文题目:无线光通信中继双跳系统的混合传输技术与性能分析学科专业:电子与通信工程学位申请人:李敏指导教师:彭张节,王明高与传统无线射频(Radio Frequency,RF)通信相比,无线光通信(Optical Wireless Communication,OWC)凭借其传输速率高、调制带宽大、安全性好以及频谱资源丰富且无需授权等优势,已引起研究者们的广泛关注,成为现代无线通信的研究重点之一。OWC通常分为室内可见光通信(Visible Light Communication,VLC)和室外自由空间光(Free Space Optical,FSO)通信。本文主要研究了融合的电力线通信(Power Line Communication,PLC)与室内VLC系统的传输技术与性能分析以及混合双跳室外FSO/RF通信系统的传输技术与性能分析。本文的主要工作包括以下几个部分:第2章针对基于单色白光LED的多输入多输出(Multiple Input Multiple Output,MIMO)PLC/VLC系统,研究了系统的误码率性能。在该系统的PLC和VLC模块中分别采用二进制相移键控调制技术调制信号,且在VLC模块中使用MIMO技术。在PLC模块中,针对有分支链路和无分支链路两种PLC参考信道,本章节中分别研究了其系统性能。仿真结果表明,无分支链路的PLC参考信道具有更好的性能。另外在以上两种PLC参考信道中,当系统无PLC脉冲噪声时,系统具有更低的误码率。第3章针对基于RGBA-LED的PLC/VLC系统,研究了系统的误码率性能。该系统在PLC和VLC模块都采用正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)技术,并采用交织映射的方法将PLC OFDM信号映射到VLC中。在VLC模块中,利用分离,剪切后偏置操作对接收到的VLC OFDM信号进行调整,使其能够通过RGBA-LED传输。在接收端,我们分别采用直接检测算法和迫零算法来检测接收信号。最后,我们重建检测到的接收信号以恢复原始发送信号。仿真结果表明,PLC通道中的脉冲噪声对系统性能有显著影响。另外,在高阶调制方案的高信噪比区,VLC信道中的串扰会降低系统的误码率性能。第4章针对室外无线光通信中混合双跳FSO/RF解码转发中继系统,研究了系统的中断概率。在该系统中,RF链路采用K分布信道模型,而假设FSO链路采用M分布模型。我们推导了系统端到端信噪比的累积密度函数的闭合表达式,并由此推导出中断概率的闭合表达式。最后,仿真结果验证了理论推导的正确性。更多还原

【Abstract】 Compared with traditional radio frequency(RF)communication,Optical Wireless Communication(OWC)has the advantages of high transmission rate,large modulation bandwidth,good security,rich spectrum resources and no authorization.Therefore OWC has aroused the researcher’s widespread attention,and becomes one of the modern wireless communication research focal point.OWC is usually divided into indoor Visible Light Communication(VLC)and Outdoor Free Space Optical(FSO)communication.This paper mainly studies the transmission technology and performance analysis of the integrated Power Line Communication(PLC)and indoor VLC systems,and the transmission technology and performance analysis of the hybrid dual-hop outdoor FSO/RF communication system.The main work of this paper includes the following parts:In Chapter 2,the BER performance of the system is studied for the Multiple Input Multiple Output(MIMO)PLC/VLC system based on monochrome white LED.Binary Phase Shift Keying modulation techniques are adopted to modulate the signals in the PLC and VLC modules of the system,respectively,and MIMO technology is used in the VLC module.In the PLC module,for the PLC reference channel with branch link and branchless link,the system performance is studied in this chapter.The simulation results show that the PLC reference channel without branch link has better performance.In addition,in the above two PLC reference channels,when the system has no PLC impulse noise,the system has a lower bit error rate.Chapter 3 studies the BER performance of the system for RGBA-LED based PLC/VLC systems.The system uses Orthogonal Frequency Division Multiplexing(OFDM)technology in both PLC and VLC modules,and employs the interleaving mapping method to map PLC OFDM signals into VLC.In the VLC module,the received VLC OFDM signal is adjusted using a split,post-shear bias operation to enable transmission through the RGBA-LED.At the receiving end,we use the Direct Detection and the Zero Forcing algorithms to detect the received signal.Finally,we reconstruct the detected received signal to recover the original transmitted signal.The simulation results show that the impulse noise in the PLC channel has a significant impact on system performance.In addition,in the high signal-to-noise ratio region of the high-order modulation scheme,crosstalk in the VLC channel can degrade the BER performance of the system.Chapter 4 studies the system’s outage probability for hybrid dual-hop FSO/RF decoding and forwarding relay systems in outdoor wireless optical communication.In this system,the RF link uses the K-distributed channel model,and the FSO link is assumed to adopt the M-distribution model.We derive the closed expression of the Cumulative Distribution Function of the system’s end-to-end SNR,and produce the closed expression of the outage probability.Finally,the simulation results verify the correctness of the theoretical derivation.更多还原