ID 原文 译文
14415 采用自适应编码调制,结合感知结果、测量结果和状态信息的多源融合实现链路的自适应,并通过可重构抗干扰收发信机的参数配置实现链路级安全防护及无线资源调度,实现了无人机测控通信系统随机接入与越区切换、无线资源管理、感知辅助安全防护、链路自适应等功能,提升了无人机系统的生存性、灵活性和作战效能,有效增强了无人机系统在未来复杂战场作战的能力。 The adaptive coding modulation is adopted to realize the link adaptation by combining the multi-source fusion of sensing results , measurement results and state information, and the link level security protection and wireless re- source scheduling are realized through the parameter configuration of reconfigurable anti-interference trans- ceiver. The system realizes the functions of UAV TT&C communication system,such as random access and handover,wireless resource management, perception assisted security protection, link adaptation , improves the survivability,flexibility and operational effectiveness of UAV system,and effectively enhances the com- bat capability of UAV system in complex battlefield in the future.
14416 针对低轨卫星宽带正交频分复用通信系统中相位噪声和群时延影响相互耦合而恶化接收机性能的问题,提出了一种相位噪声群时延联合估计算法。 In broadband low Earth orbit( LEO) satellite communication system with orthogonal frequency division multiplexing( OFDM) ,the phase noise and group delay causing phase distortion are coupled with each other,which degrades the performance of the receiver. In order to solve this problem,an algorithm for estimating and compensating the effect of phase noise and group delay jointly is proposed.
14417 通过理论分析相位噪声群时延耦合下接收信号特征,利用非线性群时延泰勒级数模型与相噪连续特性,基于导频和二维估计内插实现了接收信号公共相位误差的联合估计。 Through theoretical analysis of the characteristics of the received signal under the coupling effect of the two factors, pilot symbols are inserted in the time-frequency domain of the OFDM signal to estimate the common phase error of the received signal. Using the nonlinear group delay Taylor Series model and the continuity characteris- tics of phase noise, the two-dimensional estimation and interpolation is applied to estimate phase distortion.
14418 仿真结果表明,该算法能够有效估计系统相位噪声与群时延引入的相位失真,与传统独立估计和分离估计方法相比性能均有较大提升。 The simulation results demonstrate the algorithm can effectively estimate the phase distortion and out- performs the traditional methods which compensate the noise separately.
14419 为提高辐射源个体识别准确度,解决工程化应用问题,同时避免在信号样本有限的情况下单一识别算法的局限性,提出了一种结合卷积神经网络和随机森林的辐射源个体识别方法。 In order to improve specific emitter identification accuracy and solve the engineering application problems ,a new specific emitter recognition algorithm based on the combination of convolutional neural net- work( CNN) and random forest is proposed.
14420 该方法分别利用卷积神经网络和随机森林训练生成两组个体识别模型,然后采用识别概率统计法生成不同辐射源个体的综合权值向量,最后根据权重向量形成针对不同辐射源个体的综合识别模型。 This algorithm can avoid limitations of single algorithm when the signal sample is limited. It provides two groups of specific emitter identification model by using CNN and random forest,then applies probability statistics to obtain the comprehensive weight of different specific emitter,finally produces comprehensive identification model by using comprehensive weight.
14421 仿真结果表明,相较于单一算法,所提方法能够提升整体识别准确率,同时,对不同辐射源个体均有较好的适用性。 Simulation re- sults show that the proposed method can increase specific emitter identification accuracy and is suitable for different specific emitters.
14422 海战场环境下受复杂识别链路时序关系及海面复杂电磁传播环境影响,飞机时常错误识别海上目标的敌我属性,带来误击事件发生隐患。 Under the sea battlefield environment, due to the influence of complex identification link timing re- lationship and complex sea electromagnetic propagation environment, aircraft often mistakenly identifies the enemy and friend attributes of sea targets,which leads to the hidden danger of accidental attack.
14423 以北约敌我识别系统Mark XII为研究对象,分析了飞机识别海上目标敌我属性技术机理和信号链路流程,给出了不同链路情况下的敌我识别结果,从系统本身、自然环境、电子对抗等角度对识别错误机理进行了分析。 Taking the NATO identification friend or foe( IFF) system Mark XII as the research object,this paper discusses the tech- nical mechanism and sional link flow of aircraft identification of taroet at sea.oives the identification results under different links,and discusses the error recognition mechanism caused by the system itself, natural envi- ronment and electronic countermeasures.
14424 研究结论可为我国空海敌我识别能力的提升提供借鉴,也可为开展国外敌我识别系统电子对抗提供有效支撑。 The research conclusion can provide not only reference for the im- provement of China's air sea IFF capability,but also effective support for confronting foreign IFF systems.