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| Acceleration and Velocity Estimation of Targets in Bistatic Multi-Frequency FMCW Radar |
| Qin Guo-dong; Chen Bai-xiao; Yang Ming-lei; Zhang Shou-hong |
| National Key Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China |
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Abstract The bistatic multi-frequency FMCW radar uses sparse-array to transmit the FMCW signals of multiple carrier frequencies, and an array to receive the echoes. The Doppler spectrum is widened because the Doppler signals are modulated by acceleration and velocity of maneuvering target, which leads to the degeneration of radar’s detection performance. The signal model of bistatic multi-frequency FMCW radar is analyzed in this paper. A method using Discrete Polynomial-phase Transform(DPT) and phase difference is presented to obtain the high-accuracy acceleration and velocity estimation of target. The performance of the proposed method is analyzed when the data is divided into different segments. The simulation indicates that the method can obtain a high-accuracy estimation of both acceleration and velocity with a small computational complexity.
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Received: 22 January 2008
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2009, Vol. 31 
