摘要
随着多机协同作战中组网平台规模的不断扩大,建立机-机机-站通信的可用频谱资源愈发紧张。地空通信链路端机发射信号时,产生旁瓣信号会泄露到相邻频道内,影响相邻频道内其他平台间的通信,采用预留频率保护间隔的方法将带来频谱资源的浪费。因此从链路端机源头出发,基于正交切比雪夫多项式构造预失真器,提高功率放大器的线性度,减小信号发射时的邻道泄露,提高频谱资源利用率。经仿真验证,功率放大器邻近信道功率比指标由-33 dBc降低至-45 dBc,可有效支撑多机协同作战等复杂多平台作战场景下的链路通信。
With expansion of the scale of networking platform in multi-aircraft cooperative operation,the available spectrum resources for establishment of air-machine machine-station communication are becoming more and more intense.The sidelobe signal will leak into adjacent channel,which will affect the communication between other platforms in adjacent channel.The method of reserved frequency protection interval will result in waste of spectrum resources.In this paper,a predistortion device is constructed based on orthogonal Chebyshev polynomial to improve the linearity of power amplifier,reduce the adjacent channel leakage and improve the utilization of spectrum.The simulation results show that the power ratio index of adjacent channel is reduced from-33dBc to-45dBc,which can effectively support the link communication in complex multi-platform operation scenarios.
作者
邵猛
肖林
张世辉
刘雪
SHAO Meng;XIAO Lin;ZHANG Shihui;LIU Xue(Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)
出处
《飞机设计》
2025年第3期57-61,共5页
Aircraft Design
关键词
多机协同作战
正交切比雪夫多项式
邻近信道功率比
multi-aircraft cooperative operation
orthogonal chebyshev polynomial
adjacent channel power ratio
