A New Multistatic FMCW Radar Architecture by Over-the-Air Deramping

作者：Ash Matthew^*; Ritchie Matthew; Chetty Kevin; Brennan Paul V

来源：IEEE Sensors Journal, 2015, 15(12): 7045-7053.

DOI：10.1109/JSEN.2015.2466477

• FMCW radar
• bistatic radar
• multistatic radar
• passive radar
• passive bistatic radar
• micro-Doppler
• distributed sensors

Frequency modulated continuous wave (FMCW) radar is widely adopted solution for low-cost, short to medium range sensing applications. However, a multistatic FMCW architecture suitable for meeting the low-cost requirement has yet to be developed. This paper introduces a new FMCW radar architecture that implements a novel technique of synchronizing nodes in a multistatic system, known as over-the-air deramping (OTAD). The architecture uses a dual-frequency design to simultaneously broadcast an FMCW waveform on a lower frequency channel directly to a receiver as a reference synchronization signal, and a higher frequency channel to illuminate the measurement scene. The target echo is deramped in hardware with the synchronization signal. OTAD allows for low-cost multistatic systems with fine range-resolution, and low peak power and sampling rate requirements. Furthermore, the approach avoids problems with direct signal interference. OTAD is shown to be a compelling solution for low-cost multistatic radar systems through the experimental measurements using a newly developed OTAD radar system.

• 出版日期2015-12