title: Doppler shift and ambiguity velocity caused by relative motion in quantum-enhanced measurement.
abstract: We study the effect of relative motion on a frequency-entangled-based ranging scheme. Two major puzzles arise, i.e., Doppler shift and ambiguity velocity. During condition of rapid relative motion, Doppler shift invalidates the measurement result of this scheme; while during condition of slow relative motion, the ambiguity velocity turns into a major limitation. If relative speed between targets and measurement platform exceeds the ambiguity velocity, an accumulated profile obtained by the coincidence measurement will be distorted, which causes a lower ranging accuracy. Theoretical analysis shows a time-varying delay can be introduced to solve the two major puzzles.
authors.forename: Yanghe
authors.initials: Y
authors.lastname: Shen
authors.forename: Luping
authors.initials: L
authors.lastname: Xu
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Peng
authors.initials: P
authors.lastname: Yang