Direction-of-arrival measurement device and method based on large-scale antenna array
A large-scale antenna and measurement device technology, applied in the field of array antennas, can solve the problems of unbearable complexity of traditional algorithms, difficulty in realizing DOA estimation, and high complexity of data processing, so as to reduce measurement complexity, reduce measurement cost, and reduce antenna Quantity effect
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Embodiment 1
[0054] The sliders on the horizontal synchronous belt slide table and the vertical synchronous belt slide table are controlled by the stm32 single-chip microcomputer to be located at (x, y) positions, x=0,...,M; y=0,...,N,M,N Represents a positive integer.
[0055] Each time the stm32 single-chip microcomputer controls the movement distance of the slider to be less than or equal to half a wavelength (the wavelength with the measurement source), the phase difference of the incoming wave direction in the horizontal and vertical directions is obtained.
[0056] The voltage values of the VPHS terminals (that is, the phase output terminals) of the two AD8302s are sampled by the stm32 microcontroller ADC.
[0057] In the microcontroller, by the formula y=3.4959e -7 x 3 -9.6342e -6 x 2 -0.0027307x+1.6882 for conversion between voltage and phase, x represents the voltage value of the VPHS terminals (ie, phase output terminals) of the two AD8302s sampled by the ADC of the stm32 s...
Embodiment 2
[0084] Single signal source measurement: M=N=8, the moving interval is half a wavelength, a single source is used, the frequency of the source is 2.554GHz, and the antenna uses a sleeve antenna to send signals. Carry out DOA estimation by the method provided by the present invention, and draw its actual measurement result in MATLAB, the result is as follows Figure 7 As shown, the azimuth angle of a single signal source is 160°, and the elevation angle is 36°. The measurement in the laboratory is not an ideal environment. There are reflections from metal objects in the laboratory and electromagnetic interference from the surrounding environment, resulting in other interference information.
Embodiment 3
[0086] Two signal sources are measured: M=N=16, the mobile interval is half a wavelength, two sources are adopted, and the single source in the second embodiment is separated by a power divider, as two source measurements, the frequency of the source is 2.554GHz, At the same time, the antenna uses a sleeve antenna for transmission, and the two antennas use 6dB and 10dB gain antennas respectively. Carry out DOA estimation by the method provided by the present invention, and draw its actual measurement result in MATLAB, the result is as follows Figure 8 As shown, one of the signal sources has an azimuth angle of 110° and an elevation angle of 12°, and the other signal source has an azimuth angle of 210° and an elevation angle of 12°. The measurement in the laboratory is not an ideal environment. There are reflections from metal objects in the laboratory and electromagnetic interference from the surrounding environment, resulting in other interference information.
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