US 12,461,194 B2
Method for improving target detection accuracy, and integrated circuit, and radio device
Xiaolong Zhang, Shanghai (CN)
Assigned to Calterah Semiconductor Technology (Shanghai) Co., Ltd., Shanghai (CN)
Appl. No. 17/998,802
Filed by CALTERAH SEMICONDUCTOR TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai (CN)
PCT Filed Mar. 1, 2021, PCT No. PCT/CN2021/078409
§ 371(c)(1), (2) Date Nov. 14, 2022,
PCT Pub. No. WO2021/170133, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202010131027.X (CN), filed on Feb. 28, 2020.
Prior Publication US 2023/0258766 A1, Aug. 17, 2023
Int. Cl. G01S 13/58 (2006.01); G01S 7/28 (2006.01); G01S 7/35 (2006.01); G01S 7/41 (2006.01)
CPC G01S 7/354 (2013.01) [G01S 7/356 (2021.05); G01S 7/411 (2013.01); G01S 13/584 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for improving object detection accuracy, comprising:
transmitting, by a transmitting antenna, radio signals to a target area;
receiving, by a receiving antenna, echo signals from one or more objects in the target area reflecting the radio signals;
mixing, by a mixer, the radio signals and the echo signals to obtain difference frequency signals;
performing analog-to-digital conversion (ADC), sampling, range fast Fourier transform (1D FFT), doppler fast Fourier transform (2D FFT), and constant false alarm rate (CFAR) detection on the difference frequency signals to obtain a velocity ambiguity factor q, a remainder frd of a doppler frequency shift fD, a sampling interval of an input data of the 2D FFT, and object peak data, wherein fD=frd+q×F and F represents a pulse repetition frequency;
obtaining a compensation value based on a compensation coefficient, the velocity ambiguity factor, the remainder of the doppler frequency shift, and the sampling interval of the input data of the 2D FFT, wherein the compensation coefficient is a preset constant or is obtained based on the sampling interval of the input data of the 2D FFT, and;
compensating the object peak data based on the compensation value; and
obtaining object data based on the compensated object peak data.