Four-Channel C-Band FMCW Radar Demonstrator with Real-Time Signal Processing and Data Presentation

Based on the long-known and well-described radar design techniques, this paper introduces a four-channel FMCW (Frequency Modulated Continuous Wave) radar system built from COTS (Commercial-Off-The-Shelf) elements for imaging purposes. Starting with a short historical view of the matter in question, general advantages, and motivations for the developed solution, the article presents the theory of operation of FMCW radar, as well as the construction of the analog part, the digital part, and the developed software. The most fundamental signal processing algorithms are also covered as a starting point for more advanced techniques, which may be further implemented. The developed radar system allows for the use of wide bandwidth - up to 1 GHz - which gives resolutions up to tenths of centimeters, and a high rate of pulse repetition frequency (8 kHz), which gives the opportunity to detect high-speed objects. The paper does not aim to provide any scientific novelties but rather to present the possibility of creating a simple and effective solution.