The Multi-Band Orthogonal Frequency Division Multiplexing Ultra WideBand (MB-OFDM-UWB) is one of the communication systems for Wireless Avionics Intra-Communications (WAIC). Unlike indoor wireless channels, UWB ideband signals have complex reflection and multipath interference in metal and composite cabins. In this paper, a physical layer scheme of the MB-OFDM-UWB wireless communication system suitable for WAIC application is presented, and according to the IEEE802.15.4a standard, a multi-cluster and multi-path UWB channel model adapted to the internal characteristics of avionics cabin is proposed. The impulse response of the wireless channel is simulated based on the reflection angle error method of the receiving sphere, and the cluster arrival rate, path arrival rate, and mixing factor of the channel model in the cabin environment are determined. Then the MB-OFDM-UWB signal system simulation using Simulink is carried out. The results show that under the code rate of 110 Mb/s, the signal-to-noise ratio in the cabin environment should be 1 dB higher than that in the normal indoor environment when the bit error rate is lower than 10-6 specified in the International Telecommunications Union(ITU) standard. In addition, in order to confirm the validity of the receiving sphere radius in electromagnetic simulation, the simulation results are compared with the measured results in the reference environment.
[1] 王昊天, 李峭, 熊华钢. 性能保证条件下航空电子高速交换机的加速方法[J]. 航空学报, 2010, 31(8):1653-1659. WANG H T, LI Q, XIONG H G. Speedup scheme for avionic high-speed switch under performance guaranteed constraints[J]. Acta Aeronautica et Astronautica Sinica, 2010, 31(8):1653-1659(in Chinese).
[2] DANG D K, MIFDAOUI A, GAYRAUD T. Design and analysis of UWB-based network for reliable and timely communications in safety-critical avionics[C]//10th IEEE Workshop on Factory Communication Systems. Piscataway, NJ:IEEE Press, 2014:1-10.
[3] SUWANATEEP M. Inflight internet connectivity technology and its application on E-commerce[J]. Der Pathologe, 2004, 20(1):84-86.
[4] SáMANO-ROBLES R, TOVAR E, CINTRA J, et al. Wireless avionics intra-communications:Current trends and design issues[C]//Eleventh International Conference on Digital Information Management. Piscataway, NJ:IEEE Press, 2017:266-273.
[5] AKRAM R N, MARKANTONAKIS K, MAYES K, et al. Security and performance comparison of different secure channel protocols for avionics wireless networks[C]//2016 IEEE/AIAA 35th Digital Avionics Systems Conference (DASC). Piscataway, NJ:IEEE Press, 2016:1-8.
[6] PARK P, CHANG W. Performance comparison of industrial wireless networks for wireless avionics intra-communications[J]. IEEE Communications Letters, 2016, 21(1):116-119.
[7] DAS S, DAS S S, CHAKRABARTI I. Hardware implementation of MIL-STD-1553 protocol over OFDMA-PHY based wireless high data rate avionics systems[C]//IEEE International Conference on Advanced Networks & Telecommunications Systems. Piscataway, NJ:IEEE Press, 2017:1-6.
[8] SURYANEGARA M, NASHIRUDIN A, RAHARYA N, et al. The compatibility model between the Wireless Avionics Intra-Communications (WAIC) and fixed services at 22-23 GHz[C]//IEEE International Conference on Aerospace Electronics & Remote Sensing Technology. Piscataway, NJ:IEEE Press, 2016:1-5.
[9] AMETI A, FONTANA R J, KNIGHT E J, et al. Ultra wideband technology for aircraft wireless intercommunications systems (AWICS) design[J]. IEEE Aerospace & Electronic Systems Magazine, 2003, 19(7):14-18.
[10] LEIPOLD F. Wireless in-cabin communication for aircraft infrastructure[J]. Telecommunication Systems, 2013, 52(2):1211-1232.
[11] DANG D K, MIFDAOUI A, GAYRAUD T. Fly-by-wireless for next generation aircraft:Challenges and potential solutions[C]//2012 IFIP Wireless Days. Piscataway, NJ:IEEE Press, 2013:1-8.
[12] ZHANG C, XIAO J, ZHAO L. Wireless asynchronous transfer mode based fly-by-wireless avionics network[C]//IEEE/AIAA 35th Digital Avionics Systems Conference. Piscataway, NJ:IEEE Press, 2013:4C5-1-4C5-9.
[13] ZHANG C, ZHANG Y. Short range magnetic communications for contactless sensors on aircraft[C]//IEEE/AIAA 35th Digital Avionics Systems Conference. Piscataway, NJ:IEEE Press, 2016:1-8.
[14] SURYANEGARA M, RAHARYA N. Modulation performance in Wireless Avionics Intra Communications (WAIC)[C]//International Conference on Information Technology, Computer and Electrical Engineering. Piscataway, NJ:IEEE Press, 2015:434-437.
[15] CHUANG J, XIN N, HUANG H, et al. UWB radiowave propagation within the passenger cabin of a Boeing 737-200 aircraft[C]//IEEE Vehicular Technology Conference-Vtc2007-Spring. Piscataway, NJ:IEEE Press, 2007:496-500.
[16] 蒋宇乐, 熊华钢, 查振羽. 机舱内部超宽带确定性信道建模[J]. 航空学报, 2010, 31(1):158-164. JIANG Y L, XIONG H G, ZHA Z Y. Deterministic modeling method for aircraft inside-cabin UWB channels[J]. Acta Aeronautica et Astronautica Sinica, 2010, 31(1):158-164(in Chinese).
[17] ZHANG C, YU J. Real-time aircraft cabin channel modeling[C]//IEEE International Conference on Communication Technology. Piscataway, NJ:IEEE Press, 2011:141-145.
[18] ZHANG C, YU J, PANG K. Multiple access points deployment optimization in cabin wireless communications[J]. IEEE Antennas & Wireless Propagation Letters, 2013, 12(1):1220-1223.
[19] 吴庆, 王彤, 屠晓杰, 等. 机舱内部超宽带无线信道参数仿真[J]. 计算机仿真, 2014, 31(12):49-53. WU Q, WANG T, TU X J, et al. Calculation of ultra wideband channel parameters in aircraft cabin[J]. Computer Simulation, 2014, 31(12):49-53(in Chinese).
[20] GAO J, LIU Y, WANG K. EMI analysis and improvement of fuel quantity indication system on board[C]//IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications. Piscataway, NJ:IEEE Press, 2013:612-614.
[21] BALAKRISHNAN J, BATRA A, DABAK A. A multi-band OFDM system for UWB communication[C]//2003 IEEE Conference on Ultra Wideband Systems and Technologies. Piscataway, NJ:IEEE Press, 2003:354-358.
[22] IEEE. Wireless Medium Access Control (MAC) and Physical Layer (PHY) for Low Rate WPANs:Std 802.15.4 Specs[S]. 2003-10-01.
[23] BATRA A, BALAKRISHNAN J, AIELLO G R, et al. Design of a multiband OFDM system for realistic UWB channel environments[J]. IEEE Transactions on Microwave Theory & Techniques, 2004, 52(9):2123-2138.
[24] MOLISCH A F. Ultra-wide-band propagation channels[J]. Proceedings of the IEEE, 2009, 97(2):353-371.
[25] CHAO Y L, SCHOLTZ R A. Optimal and suboptimal receivers for ultra-wideband transmitted reference systems[C]//IEEE Global Telecommunications Conference. Piscataway, NJ:IEEE Press, 2013:759-763.
[26] JINAUKONG. Theory of electromagnetic wave[M]. New York:Wiley, 1975:120-132.
[27] JACOB M, CHEE K L, SCHMIDT I, et al. Influence of passengers on the UWB propagation channel within a large wide-bodied aircraft[C]//European Conference on Antennas & Propagation. Piscataway, NJ:IEEE Press, 2009.
[28] 盛新庆. 电磁波述论[M]. 北京:科学出版社, 2007:122. SHENG X Q. Electromagnetic wave theory[M]. Beijing:Science Press, 2007:122(in Chinese).
[29] 朱正吼. 碳纤维复合材料电磁特性研究[J]. 机械工程材料, 2001, 25(11):14-16. ZHU Z H. Electromagnetic properties of carbon fiber composite[J]. Materials for Mechanical Engineering, 2001, 25(11):14-16(in Chinese).
[30] MORAIS A P, JR G C, MARIOTTO L, et al. Numerical distance relaying algorithm based on mathematical morphology and least-squares curve fitting method[J]. Electric Power Systems Research, 2011, 81(5):1144-1150.
[31] CHEE K L, JACOB M, KUERNER T. A systematic approach for UWB channel modeling in aircraft cabins[C]//2009 IEEE 70th Vehicular Technology Conference Fall. Piscataway, NJ:IEEE Press, 2010:1-5.
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