Range and velocity estimation of radar targets by weighted OFDM modulation

In this paper, we address the problem of spectrum sharing and co-existence between radar and communications systems by using a reconfigurable dual-use radar/comm system on a single RF platform. We develop a nonlinear least-squares method for range and velocity estimation of moving targets using weighted orthogonal division multiplexing (WOFDM) waveform modulation scheme. The corresponding Cramer-Rao low bounds for the target parameter estimator are derived. Weighted OFDM waveform is derived subject to a low peak to average power ratio constraint. The proposed WOFDM modulation scheme shows improved accuracy for delay estimation compared with the classic constant envelope OFDM modulation method while achieving a lower peak to average power ratio.