Hybrid beamforming for multiple input multiple output (MIMO) radar systems in a jamming enviroment is investigated. A new hybrid beamforming (HB) technique is proposed to reduce the dimensionality of the covariance matrix and to have a better jamming and interference mitigation capability. HB consists of two stages. The first stage decodes, phase shifts the received signals and adds signals decoded by the same code from different antenna elements. The second stage exploits digital beamforming techniques such as Minimum Variance Distortionless Response (MVDR) or convex optimization beamforming to determine the complex weights using N × N covariance matrix where N is the number of transmitting antennas. Simulation results show that the proposed HB technique can achieve better interference and jamming suppression results in comparison with other radar configurations. In addition, the HB technique has the potential to reduce the complexity of MIMO radar signal processing such as space-time adaptive processing.

Additional Metadata
Keywords hybrid beamforming, interference mitigation, MIMO radar, MVDR
Persistent URL dx.doi.org/10.1109/RADAR.2018.8378698
Conference 2018 IEEE Radar Conference, RadarConf 2018
Citation
Chahrour, H. (Hossein), Rajan, S, Dansereau, R, & Balaji, B. (Bhashyam). (2018). Hybrid beamforming for interference mitigation in MIMO radar. In 2018 IEEE Radar Conference, RadarConf 2018 (pp. 1005–1009). doi:10.1109/RADAR.2018.8378698