Based on CS Distributed Multi-carrier MIMO HF Radar Signal Processing

摘要

This paper applied the distributed multi-carrier MIMO radar model to HF radar, widely separate the antennas. For high frequency band electromagnetic interference seriously, the model selects the silent band, emitting orthogonal frequency phase-encoded signal. We deduce the echoes expression of the distributed multi-carrier radar system, and analyze the resolution of the model. For the received antennas it is difficult to combination the echoes power from widely arranged transmitters, because of the same target has different time delay and Doppler frequency in different channels under angle and frequency diversity system. So, the echo energy accumulation is the key issue. The compressed sensing theory is applied to this model, by constructing over complete target information dictionary, estimates the reflection coefficient of all the components, integrated the entire energy in different channels. It is successful to solve the physical layer signal fusion, taken advantage of different angle echo information, enhanced system resolution and weak target detection capability, and overcomes HF target RCS scintillations. The model improves the performance of HF radar system and the freedom of time and space, frequency management, and the serious interference environment survivability.