基于预测的卫星功率控制算法
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摘要
针对卫星通信系统传输时延大的特点,提出了一种适用于卫星移动通信长时延信道的上行功率控制算法。该算法基于信干比平衡准则,使用ARIMA预测模型以获得未来的信道增益值,再根据实际SIR、实际信道增益及目标SIR得出下一周期发射功率。仿真结果表明,该算法在MES低速移动情况下,能够有效克服长时延引起的功率控制滞后性,较经典算法提高了10%的概率收敛在2 dB控制误差内。
Aiming at the characteristics of large delay of transmission in satellite communication system, an uplink power control algorithm suitable for long-delay channel of satellite mobile communication is proposed. The algorithm is based on the signal-to-interference ratio balancing criterion and uses the ARIMA prediction model to obtain future channel gain values. Then, the next period of transmit power is derived based on the actual SIR, the actual channel gain, and the target SIR. The simulation results indicate that the proposed algorithm can effectively overcome the power control hysteresis caused by long delay in the case of MES low-speed movement, and improves the convergence probability by 10% in the 2 dB control error compared with the classical algorithm.
Aiming at the characteristics of large delay of transmission in satellite communication system, an uplink power control algorithm suitable for long-delay channel of satellite mobile communication is proposed. The algorithm is based on the signal-to-interference ratio balancing criterion and uses the ARIMA prediction model to obtain future channel gain values. Then, the next period of transmit power is derived based on the actual SIR, the actual channel gain, and the target SIR. The simulation results indicate that the proposed algorithm can effectively overcome the power control hysteresis caused by long delay in the case of MES low-speed movement, and improves the convergence probability by 10% in the 2 dB control error compared with the classical algorithm.
引文
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[2]Gao Y,Zhang X,Yang D.A Novel Power Control Algorithm on the Reverse Link of CDMA Systems[C].2007IEEE 65th Vehicular Technology Conference,2007:2832-2836.
[3]刘冰.基于SIR平衡的CDMA分布式功率控制算法研究[D].南京:南京邮电大学,2012.LIU Bing.CDMA Distributed Power Control Algorithm Based on SIR Balance[D].Nanjing:Nanjing University of Posts and Telecommunications,2012.
[4]Meyerhoff H J.Method for Computing the Optimum Power Balance in Multibeam Satellites[J].COMSAT Tech.Rev.,1974,4(01):139-146.
[5]Koskie S,Gajic Z.A Nash Game Algorithm for SIR-based Power Control in 3G Wireless CDMA Networks[J].IEEE/ACM Transactions on Networking,2005,13(05):1017-1026.
[6]Saraydar C,Mandayam N B,Goodman D J.Efficient Power Control via Pricing in Wireless Data Networks[J].IEEETrans.on Commun.,2002,50(02):291-303.
[7]喻的雄,蔡跃明,钟卫.CDMA系统中一种新的分布式博弈功率控制算法[J].电子与信息学报,2008(02):443-446.YU De-xiong,CAI Yue-ming,ZHONG Wei.a New Distributed Game Power Control Algorithm in CDMASystem[J].Journal of Electronics and Information,2008(02):443-446.
[8]Sarkar S,Mitra S,Nath T,et al.Performance of Different Power Control Schemes for a Hybrid LTE System with Channel Impairment[C].2017 International Electrical Engineering Congress(iEECON),2017:1-4.
[9]Wang Y,Qian M,Han X,et al.Game-Theoretic Power Control for Interference Mitigation in Two-Tier Small Cell Networks[C].2014 IEEE 79th Vehicular Technology Conference(VTC Spring),2014:1-5.
[10]王园园,周一青,李永会等.基于随机学习的异构蜂窝网络离散功率控制机制[J].高技术通讯,2016,26(05):432-439.WANG Yuan-yuan,ZHOU Yi-qing,LI Yong-hui,et al.Discrete Power Control Mechanism in Heterogeneous Cellular Networks Based on Stochastic Learning[J].High Technology Communication,2016,26(05):432-439.
[11]田霖,翟国伟,黄亮等.基于集中式接入网架构的异构无线网络资源管理技术研究[J].电信科学,2013,29(06):25-31.TIAN Lin,ZHAI Guo-wei,HUANG Liang,et al.Research on Resource Management Technology of Heterogeneous Wireless Networks Based on Centralized Access Network Architecture[J].Telecommunications Science,2013,29(06):25-31.
[12]Monk A M,Milstein L B.Open-loop Power Control Error in Land Mobile Satellite System[J].IEEE Journal on Selected Areas in Communications,1995,13(02):205-212.
[13]汪春霆.卫星通信系统[M].北京:国防工业出版社,2012:161-163.WANG Chun-ting.Satellite Communication System[M].Beijing:National Defense Industry Press,2012:161-163.
[14]Gunnarsson F,Gustafsson F,Blom J.Dynamical Effects of Time Delays and Time Delay Compensation in Power Controlled DS-CDMA[J].IEEE Journal on Selected Areas in Communications,2001,19(01):141-151.
[15]Gombachika H S H,Tafazolli R,Evans B G.Predictive Power Control for S-UMTS Based on Least-MeanSquare Algorithm[C].Third International Conference on3G Mobile Communication Technologies,2002:128-132.
[16]Zhang F,Zuo Y,Sun H.Techniques of Rain Fade Countermeasures in Ka-band Satellite Communication on Ships[C].2017 16th International Conference on Optical Communications and Networks(ICOCN),2017:1-3.
[17]Hajime F,Takayuki S.Novel Mitigation Technologies for Rain Attenuation in Broadband Satellite Communication System Using from Ka-to W-band[C].2007 6th International Conference on Information,Communications&Signal Processing,2007:1-5.
[18]Zheng Y,Ren S,Xu X,et al.A Modified ARIMA Model for CQI Prediction in LTE-based Mobile Satellite Communications[C].2012 IEEE International Conference on Information Science and Technology,2012:822-826.
[19]Fontan F P,Vazquez-Castro M,Cabado C E,et al.Statistical Modeling of the LMS Channel[C].IEEE Transactions on Vehicular Technology,2001,50(06):1549-1567.