通导一体化概念框架与关键技术研究进展

通导一体化是综合PNT体系发展的重要组成部分和关键方向。对通信导航一体化的概念进行了探讨，提出了通信导航弹性融合的概念框架。面向综合PNT体系需求，设计了通导一体网络化PNT系统架构，阐述了通导一体化关键技术的研究进展，从通导一体化信号、信道、接收处理、网络架构、网络管理等多个角度进行了全面系统的梳理和分析；介绍了低轨通导融合、区域自组网通导融合、5G+UWB协同等典型成果，并对网信场图、智能网管、博弈对抗等通导一体化技术未来发展方向进行了展望。     

Tight integration of BDS-3/BDS-2/GPS/Galileo observations considering the new overlapping DISBs and its application in obstructed environments

Tight integration can enhance the model strength and positioning performance by considering the characteristic of differential inter-system bias (DISB), especially in obstructed environments. However, limited work emphasizes the comprehensive analysis of five-frequency DISBs between BDS-3 and other systems considering the receiver type, receiver configuration, and antenna type. In addition, the overlapping DISBs between BDS-3 and BDS-2 are also in great demand for further investigation since they are often regarded as one system. In this study, one DISB-float model is introduced to estimate the DISBs, and one DISB-fixed model and one DISB-free model are formulated to enhance the model strength of tight integration. Four dedicated datasets were collected to estimate the DISBs, which are also comprehensively analyzed considering the receiver type, receiver configuration, and antenna type. The results show that the DISBs between BDS-3 and other systems are rather stable over a certain period and are related to the receiver type and receiver configuration, whereas are not related to the antenna type. More interestingly, the B1I code DISB between BDS-3 and BDS-2 exhibits significant magnitude with a mean value of ?1.44 m for the baseline composed of two different receivers. In this case, the B1I code DISB must be considered and the tight integration between BDS-3 and BDS-2 considering its calibration can improve the positioning performance. Besides, the tight integration of the DISB-fixed model can significantly improve the positioning accuracy between multiple GNSS. Compared to the loose integration, the improvement of 60.6 %, 56.6 %, and 61.2 % can be obtained in the E, N, and U directions, when only two satellites are available for each system. In real obstructed environments, the tight integration of the DISB-free model can also improve the positioning performance in terms of positioning availability and accuracy, as well as the ambiguity resolution performance.     

Mahalanobis distance-based fading cubature Kalman filter with augmented mechanism for hypersonic vehicle INS/CNS autonomous integration

Inertial Navigation System/Celestial Navigation System(INS/CNS) integration, especially for the tightly-coupled mode, provides a promising autonomous tactics for Hypersonic Vehicle(HV) in military demands. However, INS/CNS integration is a challenging research task due to its special characteristics such as strong nonlinearity, non-additive noise and dynamic complexity.This paper presents a novel nonlinear filtering method for INS/CNS integration by adopting the emerging Cubature Kalman Filter(C...     

面向无人集群的通信定位一体化方法研究

针对无人集群协同作战通信/定位的集约化设计需求，提出了一种单载波频域均衡（SCFDE）与直接序列扩频（DSSS）技术有机结合的通信定位一体化波形。一方面，利用SCFDE中频域均衡易于克服频率选择性衰落且便于与DSSS结合的优势，使系统具有良好的适应复杂场景的通信能力；另一方面，利用恒包络零自相关导频序列的优良自相关和互相关特性，将其作为导频序列并计算与本地导频符号的循环移位相关，检测相关峰值即可实现整数符号周期信号到达时间估计。同时，结合用于信道估计的导频序列，构建差分延时相关模型，有效解决了小数采样周期信号到达时间估计问题，实现了高精度的信号到达时间估计。     

基于硅基MEMS三维集成技术的片式多波束发射前端

基于多波束发射前端的相控阵,具有波束灵活扫描和多目标同时通信的能力,是低轨互联网通信卫星的重要微波子系统.采用硅基MEMS三维异构集成技术,将多个微波单片集成电路MMIC(Monolithic Microwave Integrated Circuit)和硅基MEMS功分交叉网络等无源结构一体化集成,实现了一种K频段8波...