Design and Implementation of 24 GHz Multichannel FMCW Surveillance Radar with a Software-Reconfigurable Baseband

Abstract

We designed and developed a 24 GHz surveillance FMCW (Frequency Modulated Continuous Wave) radar with a softwarereconfigurable baseband. The developed radar system consists of transceiver, two selectable transmit antennas, eight parallel receive antennas, and a back-end module for data logging and to control the transceiver. The architecture of the developed radar system can support various waveforms, gain control of receive amplifiers, and allow the selection of two transmit antennas. To do this, we implemented the transceiver using a frequency synthesizer device and a two-step VGA (Variable Gain Amplifier) along with switch-controlled transmit antennas. To support high speed implementation features along with good flexibility, we developed a back-end module based on a FPGA (Field Programmable Gate Array) with a parallel architecture for the real-time data logging of the beat signals received from a multichannel 24 GHz transceiver. To verify the feasibility of the developed radar system, signal processing algorithms were implemented on a host PC. All measurements were carried out in an anechoic chamber to extract a 3D range-Doppler-angle map and target detections. We expect that the developed software-reconfigurable radar system will be useful in various surveillance applications.

Design and Implementation of FMCW Surveillance Radar Based on Dual Chirps

“…Of course, this simple DOA estimation is only possible in the condition with a single target. However, even with multiple targets, if the ranges or velocities of the targets are not identical, the outcome will be similar to that of a single-target condition in a FMCW radar system [10].…”

“…. From (10), it can be seen that the beat Here, we properly select two chirps, i.e., p and q. This is done because we want to avoid a case in which the proposed algorithm does not work properly.…”

“…Recently, there have been several studies of radar sensors for surveillance applications [1]- [10]. These areas are popular because radar sensors have many advantages compared to other sensors.…”

“…In earlier work [10]- [12], FMCW radar algorithms with multiple channels for surveillance were designed and implemented. In one study [10], the authors investigated the implementation of 24 GHz FMCW radar for surveillance and detected the range, velocity and angle of targets.…”

“…In earlier work [10]- [12], FMCW radar algorithms with multiple channels for surveillance were designed and implemented. In one study [10], the authors investigated the implementation of 24 GHz FMCW radar for surveillance and detected the range, velocity and angle of targets. Meanwhile, in other words [11]- [13], researchers presented a scalable Manuscript received 14 December, 2017; accepted 10 August, 2018.…”