An approach to achieving narrower mainlobe for MIMO radar

作者：Li Chao Hai; Li Ming; Zhang Wei

来源：Journal of the University of Electronic Science and Technology of China, 2015, 44(3): 321-325.

DOI：10.3969/j.issn.1001-0548.2015.03.001

• Dense arrays
• Doppler resolution
• Improvement factors
• Innovative approaches
• Signal to Interference
• Slow-moving targets
• Sparse arrays
• Tapering

An innovative approach is introduced to form narrower mainlobe of virtual transmitting-receiving beamforming by transmitting orthogonal coding waveforms from the antenna elements and digitally processing their echoes at the receiver. The benefits such as increasing angle resolution and increasing Doppler resolution of MIMO radar mainly depend on the sparse arrays without the adverse effects of sidelobes. However, due to the actual limitation, such as room limitation for airborne, cost or other factors, we have to set the array in dense arrays configuration which is not good at detecting slow moving target. With the proposed amplitude taper approach, a narrower main beam can be achieved with dense arrays configuration after virtual transmitting-receiving beamforming and therefore the performance of detecting slow moving target is improved. Simulation result shows that for the normalized Doppler frequency 0.062 5, i.e., slow moving target, the signal to interference and noise improvement factor (SINR IF) is increased about 7.3 dB.

• 出版日期2015
• 单位电子科技大学