关键词: 超宽带, 测距定位, 到达时间估计, 多相滤波器

Abstract:

We propose a novel UWB-TOA estimation method. High-precision sample recovery is achieved using the polyphase filter, overcoming the shortcomings of the traditional method which needs the sampling data speeds up to tens of GHz to achieve high-precision positioning, conquering the bottlenecks of AD-chip hardly implemented, and the FPGA chips fail to receive and deal with such a large number of high-speed sampling data. The proposed scheme has laid a foundation of implementation and market development of UWB positioning chips. Theoretical analysis and simulation show that the proposed scheme can achieve precise positioning in short distances, that the location error can reach the centimeter level, and that the computational complexity is largely reduced compared with the coherent detection TOA estimation.

Key words: ultra wideband, positioning, time of arrival(TOA) estimation, polyphase filter