| CPC G01S 13/89 (2013.01) [G01S 7/292 (2013.01); G01S 13/931 (2013.01)] | 19 Claims |
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1. A radar ranging method, comprising:
obtaining a pulse waveform of a transmit signal, wherein the transmit signal is a signal sent to a target object by a radar;
obtaining a sampling sequence of an echo signal, wherein the echo signal is a reflection signal of the target object that is received by the radar, and the echo signal is a saturated echo signal;
determining a first timing point in at least one sampling point on a rising edge of the sampling sequence, wherein the first timing point indicates a receive moment of the echo signal;
determining a second timing point based on the first timing point and the pulse waveform of the transmit signal, wherein the second timing point indicates a transmit moment of the transmit signal, and determining the second timing point based on the first timing point and the pulse waveform of the transmit signal comprises:
determining a confidence interval of the second timing point on the pulse waveform of the transmit signal based on the first timing point and one or more boundary conditions, wherein the one or more boundary conditions comprise at least one of (1) an amplitude of a previous sampling point of the first timing point is 0, (2) a next sampling point of the first timing point is a saturated sampling point, or (3) an amplitude of the transmit signal at a preset saturation alert point reaches a saturation threshold Vmax is a little probability event; and
determining the second timing point based on the confidence interval of the second timing point; and
calculating a distance between the radar and the target object based on the first timing point and the second timing point.
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