Title :
Compensation for the mutual coupling effect in EPSRIT DOA estimations
Author :
Zhang, T.T. ; Hui, H.T.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
The performance of the ESPRIT DOA estimation under two mutual coupling compensation approaches (open circuit voltage method and a proposed new method) was investigated in linear array monopole antennas operating at 2.4 GHz. In the new method, a new definition of mutual impedance is introduced to characterize the effect due to the mutual coupling between the array elements. The calculations of the new mutual impedances are based on an estimated current distribution. Simulation results show that the newly proposed compensation approach gives a much more accurate estimation of DOA than the open circuit voltage compensation approach when two signals are closely placed.
Keywords :
UHF antennas; adaptive antenna arrays; array signal processing; compensation; current distribution; direction-of-arrival estimation; electric impedance; electric potential; electromagnetic coupling; linear antenna arrays; mobile radio; monopole antenna arrays; 2.4 GHz; EPSRIT DOA estimation; adaptive antenna array; array signal-processing algorithms; current distribution estimation; linear antenna arrays; linear monopole antenna arrays; mobile communication; mutual coupling compensation; mutual impedance; open circuit voltage; Adaptive arrays; Antenna arrays; Circuit simulation; Coupling circuits; Direction of arrival estimation; Directive antennas; Impedance; Linear antenna arrays; Mutual coupling; Voltage;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1331962