Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 61, Issue 1, Pages 696-704Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2012.2228223
Keywords
Frequency-modulated continuous-wave (FMCW) radar; see-through-wall (STW) imaging radar; self-injection-locked (SIL) radar; sum-difference pattern; vital signs
Categories
Funding
- National Science Council, Taiwan [100-2221-E-110-081-MY3, 100-2221-E-110-082-MY3, 101-2622-E-110-005-CC3]
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This paper presents a self-injection-locked (SIL) radar with ranging and tracking capabilities to see through walls for discovering hidden people. Characterized by low complexity and high sensitivity, the proposed SIL radar merges the frequency-modulated continuous-wave and sum-difference pattern detection approaches to determine the distance and azimuth from the radar to each individual in a scene behind a wooden partition wall. An individual can be distinguished from a stationary object by using dynamic spectral subtraction to extract human motions or vital signs. Additionally, two or more individuals can be distinguished from each other by decomposing the Doppler signal into contributions of individuals in a polar domain. Consequently, a see-through-wall imaging system is constructed with the proposed SIL radar to position different individuals concealed behind a wall.
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