Ultra-wideband (UWB) positioning technology stands out from many indoor positioning technologies with its advantages of high precision. However. non-line-of-sight (NLOS) propagate leads to heavy range error and reduces position accuracy. this paper proposes a NLOS identification method based on channel impulse response (CIR). https://www.roneverhart.com/AMS-Neve-1073SPX-Single-Preamp-and-EQ-p33827/