MMSE detection method in uplink massive MIMO systems based on quantum computing

Publication date: Available online 23 January 2019Source: Physics Letters AAuthor(s): XiaoJun Wang, Jie Zhao, FanXu Meng, XuTao Yu, ZaiChen ZhangAbstractThe minimum mean square error (MMSE) detection method involved matrix inversion operation with excessive computational burden. In this paper, we develop an improved quantum linear system algorithm to solve matrix inversion problem of the MMSE detection method in uplink massive multiple-input and multiple-output (MIMO) systems. In order to apply reasonably the robust computational power of quantum computing, we optimize the preparation of the input state and the extraction of the solution from the final entangled quantum state. We prove that this algorithm can reduce computational complexity to O(Nlog⁡N).

Source: Physics Letters A - January 23, 2019 Category: Physics Source Type: research