An RIS assisted Wideband Millimeter Wave SISO-Based Positioning Method
For the effects of spatial-wideband effects during millimeter wave positioning, a novel 3-Dimensional (3D) positioning estimation method based on Reconfigurable Intelligent Surface (RIS) and Single Input Single Output (SISO) millimeter wave system is proposed. First, by designing the RIS phase profiles, the channel parameters of the direct Line-of-Sight (LoS) delay, the RIS-aided Virtual Line-of-Sight (VLoS) delay, and the Angle-of-Departure (AoD) between the RIS and the user are coarsely estimated based on the Inverse Fast Fourier Transform (IFFT). Then, the quasi-Newton method is used to refine these parameters and to estimate the location of the user. Simulations are conducted to compare the positioning performance of the proposed spatial-wideband estimation method with that of the traditional narrowband estimation method. The results show that by taking into account the spatial-wideband effects, the positioning accuracy can be improved by approximately 10％ for a bandwidth of 480 MHz and by more than 20％ as the bandwidth increases beyond 800 MHz.
Millimeter wave positioningSpatial-wideband effectReconfigurable Intelligent Surface (RIS)Single station positioning
万方数据
维普
