| 邵军虎,苏润民,姚柳,柯熙政.软切换FSO/RF链路混合编码调制算法性能分析[J].电子测量与仪器学报,2017,31(5):682-687 |
| 软切换FSO/RF链路混合编码调制算法性能分析 |
| Performance analysis of soft switching hybrid FSO/RF links using hybrid coding and modulation |
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| DOI：10.13382/j.jemi.2017.05.005 |
| 中文关键词: FSO/RF混合链路 软切换 混合编码调制 误比特率 |
| 英文关键词:FSO/RF hybrid links soft switching hybrid coding and modulation bit error rate |
| 基金项目:国家自然科学基金（61405157,61377080）、陕西省自然科学基金（2015JM6270）、陕西省工业科技攻关项目（2016GY 086）资助 |
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| Author | Institution |
| Shao Junhu | The Faculty of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China |
| Su Runmin | The Faculty of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China |
| Yao Liu | Xi’an Thermal Power Research Institute, Xi’an 710048, China |
| Ke Xizheng | The Faculty of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China |
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| 中文摘要: |
| 将自由空间光(FSO)通信链路的高速率优势与射频(RF)链路的可靠性优势互补结合，针对FSO/RF混合通信链路组网的物理层数据可靠传输问题，研究软切换机制下采用LDPC混合编码与2 PPM和16QAM调制的系统方案性能。混合系统FSO链路在Gamma Gamma信道不同湍流强度与RF链路在Rician信道不同信噪比条件下的仿真结果表明，所述方案在软切换下达到1×10-6误比特率时，不同条件下可获得1.3~8.0 dB不等的性能增益改善，显著提高在不同链路条件下FSO/RF混合通信系统的数据传输可靠性。 |
| 英文摘要: |
| Combined the high speed free space optical (FSO) link with reliable radio frequency (RF) link, hybrid LDPC coding together with 2 PPM and 16QAM modulation schemes were investigated over the soft switching FSO/RF links in this paper. Then their performances were simulated over the FSO/RF hybrid channels with different FSO turbulence strengths and different data rates. The simulation results show that by using the proposed hybrid coding modulation scheme with two SNR thresholds, about 1.3 to 8.0 dB coding gains at 1×10-6 BER can be obtained. The proposed scheme can significantly improve the efficiency of hybrid FSO/RF communication system, especially when two links have different channel conditions. |
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