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2020-08-27
A Super Resolution and Highly Stable Technique for Direction of Arrival Estimation of Coherent Sources for mm -Wave Radars
By
Progress In Electromagnetics Research B, Vol. 88, 53-71, 2020
Abstract
In this paper, a new super-resolution and highly stable DOA estimation technique of coherent sources is introduced. Furthermore, the proposed technique is applied to the data collected from the AWR1243 mm-wave 76-81 GHz frequency modulated continuous wave (FMCW) radar to estimate the DOAs of real targets. A virtual antenna array is proposed to increase the array aperture size and the dimension of the data covariance matrix which effectively helps in de-correlating the received signals and in increasing the number of detectable sources and hence improving the detection resolution. Moreover, a significant improvement in the DOA estimation capability is achieved by handling the frequency domain of the received signals instead of their time-domain representations. That is because the signal to noise ratio (SNR) is increased by a multiplication factor when it is transformed using FFT which acts as a filter for the noise. The simulation results proved the superiority of the proposed technique compared to the state of the arts in this field, especially at low SNR that approaches -35 dB.
Citation
Amr Hussein Hussein Abdullah Mohamed H. Mabrouk Haythem Hussein Abdullah , "A Super Resolution and Highly Stable Technique for Direction of Arrival Estimation of Coherent Sources for mm -Wave Radars," Progress In Electromagnetics Research B, Vol. 88, 53-71, 2020.
doi:10.2528/PIERB20052906
http://www.jpier.org/PIERB/pier.php?paper=20052906
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