Joint Instantaneous Frequency and 2-D AOA Estimation of Wideband LFM Signals
Chen Tian-qi · Dianzi xuebao · 2004
The Wigner-Ville distributions of symmetrical sensors are used to project the data from element space to time-frequency beamspace ,then a novel spatial time-frequency data model with a separable structure is achieved.Based on this model,beamspace-ESPRIT and subspace projection can be used respectively to get the instantaneous frequency and 2-D AOA of impinging signals.Simulation shows the efficacy of the proposed algorithm.