A DOA Estimation Approach for Transmission Performance Guarantee in D2D Communication
A DOA Estimation Approach for Transmission Performance Guarantee in D2D Communication
复制标题
D2D通信中传输性能保证的DOA估计方法
DOI：
10.1007/s11036-017-0820-2
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发表时间：
2017-12-01
影响因子：
3.8
通讯作者：
Shu, Lei
中科院分区：
文献类型：
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作者：
Wan, Liangtian;Han, Guangjie;Shu, Lei
在大规模多输入多输出（MIMO）系统的设备到设备（D2D）通信中，信道间干扰（ICI）会严重恶化整个系统的性能。波束形成技术可以用来缓解这种情况。因此，用户设备（UE）的定位应该被称为先验。在无线通信中，由于多径效应的影响，入射信号的模型应视为分布源而不是点源。提出了一种基于共形阵的相干分布（CD）源二维DOA估计算法。首先，基于广义导向向量（GSV）构造了三个有理不变性关系。然后利用传播算子方法估计了三个有理不变矩阵。最后，由三个有理不变矩阵的特征值得到CD源的二维波达方向。该算法无需谱峰搜索，无需对采样协方差矩阵进行估计和特征分解，计算复杂度低。针对数据量大的情况，提出了分布式并行PM的方法。仿真结果验证了该算法的有效性。
In Device-to-Device (D2D) communications of massive Multiple-Input Multiple-Output (MIMO) system, the inter-channel interference (ICI) can severely deteriorate the entire system performance. The beamforming technique can be used to alleviate this situation. Thus the localization of the users’ equipment (UE) should be known as a prior. In wireless communication, due to the effect of multipath, the model of incident signal should be regarded as distributed sources instead of point sources. In this paper, we propose a 2-D DOA estimation algorithm for coherently distributed (CD) sources based on conformal array. First, three rational invariance relationships are constructed based on generalized steering vectors (GSVs). Then the propagator method (PM) is used for estimating three rational invariance matrices. Finally, the 2-D DOA of CD sources can be obtained from the eigenvalues of three rational invariance matrices. Without spectrum peaking searching, and estimation and eigendecomposition of sampling covariance matrix, the proposed algorithm has low computational complexity. For the condition with a large amount of data, the distributed and parallel PM is proposed to deal with this problem. Simulation results verify the effectiveness of the proposed algorithm.