论文标题
多播范围的公开盲目校准和时间延迟估计
Joint blind calibration and time-delay estimation for multiband ranging
论文作者
论文摘要
在本文中，我们着重于多播收发器的盲关节校准和多径通道的时间延迟（TD）估计。我们表明，这个问题可以作为协方差匹配的特定情况。尽管此问题严重不足，但有关射频链失真和多径通道稀疏性的先前信息用于正则化。这种方法导致了一个双诺克斯优化问题，该问题被公式化为一种受压制的线性系统，并通过简单的组套索算法求解，并通过与当前状态方法相比，提出的算法为TD估计提供了更好的TD估计校准和更高的TD估计分辨率。
In this paper, we focus on the problem of blind joint calibration of multiband transceivers and time-delay (TD) estimation of multipath channels. We show that this problem can be formulated as a particular case of covariance matching. Although this problem is severely ill-posed, prior information about radio-frequency chain distortions and multipath channel sparsity is used for regularization. This approach leads to a biconvex optimization problem, which is formulated as a rank-constrained linear system and solved by a simple group Lasso algorithm.Numerical experiments show that the proposed algorithm provides better calibration and higher resolution for TD estimation than current state-of-the-art methods.
