HRRP-Based Extended Target Recognition in OFDM-Based RadCom Systems

Due to its advantages in target sensing and detection, the widely adopted orthogonal frequency division multiplexing (OFDM) signals have recently been attractive in the integrated radar and communications (RadCom) systems. An improved tone reservation scheme combing the phase coding technique to reduce the peak-to-average power ratio (PAPR) of the OFDM integrated signals is given. A novel signal processing scheme that is able to retrieve a joint estimation on the scatter type in addition to the range and velocity, is propose for the complicated target that consists of multiple scatterers. Moreover, a least square (LS) based method is given to estimate the scatterer type from the achieved high range resolution profile (HRRP) spectrum. Numerical results are provided to validate the performance advantages of the proposed schemes. Furthermore, we see that a large symbol number can help to improve the recognition accuracy of the scatterer, especially under low SNR conditions.