Digital Frequency Control Loop for Continuous-Wave and Stepped-Frequency Radars

被引：0

作者：

Michler, Fabian ^{[1
]}

Neugebauer, Marcel ^{[1
]}

Scheiner, Benedict ^{[1
]}

Weigel, Robert ^{[1
]}

Lurz, Fabian ^{[2
]}

机构：

[1] Friedrich Alexander Univ Erlangen Nuremberg, Inst Elect Engn, D-91058 Erlangen, Germany

[2] Hamburg Univ Technol, Inst High Frequency Technol, D-21073 Hamburg, Germany

来源：

2022 IEEE TOPICAL CONFERENCE ON WIRELESS SENSORS AND SENSOR NETWORKS (WISNET) | 2022年

关键词：

frequency control; frequency-locked loop; Doppler radar; distance measurement;

D O I：

10.1109/WiSNet53095.2022.9721354

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A common technique to control the transmit frequency of modern radar systems are phase-locked loops (PLLs). This paper presents an alternative PLL-free design, where a microcontroller (MCU) is used in a digital control loop to stabilize the output frequency of a voltage-controlled oscillator (VCO). Using a commercial 24 GHz integrated radar transceiver and the MCU, a discrete proportional (P) control algorithm tunes the VCO in real time without requiring a hardware PLL. In continuous-wave (CW) mode, a measurement precision of 7.6 mu m is achieved. In a pulsed dual-tone operation mode, the unambiguous range is extended to 1.4m by still achieving an accuracy of 25 mm.

引用

页码：18 / 21

页数：4