Mutual coupling error calibration method for uniform octagonal array
A technology of mutual coupling error and calibration method, which is applied in the direction of space transmission diversity, radio transmission system, electrical components, etc., can solve the problem of inability to correct the mutual coupling error of uniform octagonal array, and achieve a small number of signal sources, good effect, The effect of improving accuracy
Active Publication Date: 2019-08-02
ROCKET FORCE UNIV OF ENG
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[0006] The purpose of the present invention is to provide a mutual coupling error calibration method for a uniform octagonal array to solve the problems that the narrowband mutual coupling error calibration method in the prior art cannot perform mutual coupling error correction for a uniform octagonal array.
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[0079] In this embodiment, the validity of a mutual coupling error calibration method for a uniform octagonal array provided by the present invention is verified, and the cascaded estimation is used to estimate the mutual coupling error and the direction of the signal. It has high accuracy in mutual coupling error estimation and direction of arrival estimation. The simulation experiment is used to verify the performance of the algorithm. Consider a uniform octagonal array of 76 elements. Set the mutual coupling degree of freedom P=3, and set the normalized mutual coupling coefficient as c=[1,0.3559+j0.4836,0.0926-j0.2738] T . Assume that there are two incoherent narrowband signal sources in the far field, the signal incident angles are set to (23°, 12°), (47°, 34°), and the noise is set to zero mean Gaussian white noise. In order to compare and verify the performance of the method provided by the present invention, the auxiliary method method in the prior art is selected fo...
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The invention discloses a mutual coupling error calibration method for a uniform octagonal array, which is used for solving the problem that a traditional narrow-band cross-coupling error correction algorithm is based on simple linear arrays, circular arrays and the like instead of aiming at the structure of the uniform octagonal array. According to the method provided by the invention, a mutual coupling error self-correction algorithm is provided for a uniform octagonal array structure, a cascade estimation method is applied to a new formation, and the method is an application innovation; a cascade estimation method is applied to a special formation process, a mutual coupling error matrix needs to be converted, and a delta function mode and a Toeplitz matrix structure characteristic modeare adopted for conversion during the conversion process. In later analysis, the method finds that the effect is better than that of the existing two-dimensional array mutual coupling error self-correction, and the number of the required signal sources is smaller.
Description
technical field [0001] The invention relates to a method for calibrating mutual coupling errors of an array antenna, in particular to a method for calibrating mutual coupling errors of a uniform octagonal array. Background technique [0002] With the development of wireless mobile communication technology, the demand for mobile communication is also increasing day by day. The limitations of wireless network technology make it unable to continue to meet high communication needs. When users deploy wireless local area networks, wireless signals are often interfered, signal The penetrating ability is poor, resulting in the general problem of short transmission distance. Using new technologies to improve the efficiency of the use of limited frequency resources has become a subject of increasing concern. [0003] Beamforming is a combination of antenna technology and digital signal processing technology. It is used for directional signal transmission or reception so that the syst...
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IPC IPC(8): H04B7/08
CPCH04B7/08H04B7/086
Inventor 杨剑龚博文卢建姚志成杨波张盛魁赵曦晶沈瑞冰
Owner ROCKET FORCE UNIV OF ENG