Mutual Coupling Compensation in Receiving Arrays and Its Implementation on Software Defined Radios
Keywords:Direction of Arrival, LabView, Mutual Coupling, Receiving Antenna Arrays, SDR
Mutual coupling is compensated in a four element uniform linear receiving array using software defined radios. Direction of arrival (DoA) is estimated in real-time for the array with spacing d=λ/4. The decoupling matrix was measured using a VNA for only one incident angle. After compensation the error in DoA estimation was reduced to 5%. Comparing the DoA results with d=λ/2 spaced Uniform Linear Array (ULA), 1:2% error was observed. Although, the experiment was performed indoors with a low SNR, the results show a substantial improvement in the estimated DoA after compensation.
S. Khan, H. Sajjad, M. K. Ozdemir, and E. Arvas, “Mutual Coupling Compensation in Receiving Antenna Arrays,” 2020 International Applied Computational Electromagnetics Society Symposium (ACES), Monterey, USA, March 2020. (Submitted)
Y. Yu, H. Lui, C. H. Niow, and H. T. Hui, “Improved DOA Estimations Using the Receiving Mutual Impedances for Mutual Coupling Compensation: An Experimental Study,” in IEEE Transactions on Wireless Communications, vol. 10, no. 7, pp. 2228-2233, July 2011.
B. Rares, et al., “Experimental Evaluation of AoA Algorithms using NI USRP Software Defined Radios,” 2018 17th RoEduNet Conference: Networking in Education and Research, Cluj-Napoca, pp. 1-6, 2018.
N. Tayem, “Real Time Implemenation for DOA Estimation Methods on Ni-Pxi Platform,” Progress In Electromagnetics Research B, vol. 59, 103-121, 2014.
S. A. Alawsh, et al., “Sparse direction of arrival estimation using sparse arrays based on software-defined-radio platform,” 2017 10th International Conference on Electrical and Electronics Engineering (ELECO), Bursa, pp. 671-675, 2017.