摘要
现代航空卫星宽带通信中,随着各种技术的快速发展,乘客用户对视频会议、图像和语音高效传输及网络宽带多媒体应用等服务的需求愈加强烈,如何在机载带宽资源有限的情况下满足这些需求成为各服务提供商研究的重点。其中,改进或研究更高效的调制解调技术对于提高数据传输效率具有重要意义。针对高阶幅度相位联合键控调制方式(APSK)进行研究,分析了这种技术的基本调制解调原理并推导了其理论误码率公式,然后分别在加性高斯白噪声(AWGN)和实际机载航空环境的瑞利信道下进行性能仿真。仿真结果表明,这种新技术相比QAM有一定的性能改善,而且通过在航空环境下与自适应均衡技术的结合应用可以很好地抵抗多径衰落。
With the rapid development of various technologies,in modern aeronautical satellite broadband communication,passengers’ demands for service of video conference,high-efficient transmission of pictures and voice,broadband multimedia application and so on become even stronger,and how to meet these requirements in the condition of limited airborne bandwidth resources thus becomes the hot research topic of various services providers. Among these,to improve and develop more efficient modulation technology has important significance in raising the efficiency of data transmission. This paper discusses APSK（ Amplitude Phase Shift Keying） modulation,analyzes the basic modulation principle of this technology and derives the theoretical error probability formula. Then,the simulation on performance of 64 APSK in AWGN（Additive White Gaussian Noise） and Rayleigh channel of practical airborne communication environment is done. Simulation results indicate that this novel technology enjoys better performance as compared with QAM,and would fairly resist multipath fading when combined with adaptive equalization technology in airborne environment.
出处
《通信技术》
2015年第5期530-535,共6页
Communications Technology
基金
国家海洋局海洋公益重大科研专项基金(No.201005001-8)~~
关键词
高效调制技术
航空卫星宽带通信
64APSK
性能分析
自适应均衡
high-efficient modulation technology
aeronautical satellite broadband communication
64APSK
performance analysis
adaptive equalization
