针对冲击噪声下传统子空间类算法因接收信号二阶矩不存在而性能下降甚至失效问题,提出一种基于改进的鲁棒性主成分分析法(robust principal component analysis,RPCA)的双基地MIMO雷达参数估计方法。首先将复数信号转化为实数,以便RPCA...针对冲击噪声下传统子空间类算法因接收信号二阶矩不存在而性能下降甚至失效问题,提出一种基于改进的鲁棒性主成分分析法(robust principal component analysis,RPCA)的双基地MIMO雷达参数估计方法。首先将复数信号转化为实数,以便RPCA算法进行处理;然后利用改进RPCA算法将低秩的信号矩阵和稀疏的冲击噪声矩阵分离,得到信号子空间;最后利用ESPRIT算法估计目标位置。仿真结果表明:改进RPCA算法避免了大规模的奇异值分解,复杂度较求解RPCA的传统算法有所降低,在噪声特征指数较低时较其它抑制冲击噪声的算法估计性能更好,且特征指数越低,效果越好,实现参数自动配对且无需噪声特征指数先验信息。展开更多
In this paper, a three-dimensional(3D) geometry- based stochastic scattering model(GBSSM) for wideband multi-input multi-output(MIMO) vehicle-to-vehicle(V2V) relay-based cooperative fading channel based on geometrical...In this paper, a three-dimensional(3D) geometry- based stochastic scattering model(GBSSM) for wideband multi-input multi-output(MIMO) vehicle-to-vehicle(V2V) relay-based cooperative fading channel based on geometrical three-cylinder is proposed. Non-line-of-sight(NLOS) propagation condition is assumed in amplify-and-forward(AF) cooperative networks from the source mobile station(S) to the destination mobile station(D) via the mobile relay station(R). We extend the proposed narrowband model to wideband and also introduce the carrier frequency and bandwidth into the model. To avoid complicated procedure in deriving the analytical expressions of the channel parameters and functions, the channel is realized first. By using the realized channel matrix, the channel properties are further investigated.展开更多
文摘针对冲击噪声下传统子空间类算法因接收信号二阶矩不存在而性能下降甚至失效问题,提出一种基于改进的鲁棒性主成分分析法(robust principal component analysis,RPCA)的双基地MIMO雷达参数估计方法。首先将复数信号转化为实数,以便RPCA算法进行处理;然后利用改进RPCA算法将低秩的信号矩阵和稀疏的冲击噪声矩阵分离,得到信号子空间;最后利用ESPRIT算法估计目标位置。仿真结果表明:改进RPCA算法避免了大规模的奇异值分解,复杂度较求解RPCA的传统算法有所降低,在噪声特征指数较低时较其它抑制冲击噪声的算法估计性能更好,且特征指数越低,效果越好,实现参数自动配对且无需噪声特征指数先验信息。
基金supported by the open research fund of National Mobile Communications Research Laboratory, Southeast University (No. 2016D09)National Nature Science Foundation of China (NSFC) under grant No. 61372051
文摘In this paper, a three-dimensional(3D) geometry- based stochastic scattering model(GBSSM) for wideband multi-input multi-output(MIMO) vehicle-to-vehicle(V2V) relay-based cooperative fading channel based on geometrical three-cylinder is proposed. Non-line-of-sight(NLOS) propagation condition is assumed in amplify-and-forward(AF) cooperative networks from the source mobile station(S) to the destination mobile station(D) via the mobile relay station(R). We extend the proposed narrowband model to wideband and also introduce the carrier frequency and bandwidth into the model. To avoid complicated procedure in deriving the analytical expressions of the channel parameters and functions, the channel is realized first. By using the realized channel matrix, the channel properties are further investigated.
