Quick processing method for sensor antenna array received signals

Abstract

The invention belongs to a quick processing method for a sensor antenna array received signals. The quick processing method comprises dividing subarrays, establishing signal matrixes of the subarrays, establishing autocorrelation matrixes and cross correlation matrixes, establishing signal subspace matrixes, establishing signal characteristic matrixes and inverse matrixes thereof, establishing transition matrixes, establishing rotation invariable relation matrixes, and finally obtaining incoming wave angles of different signals. A method of directly establishing the rotation invariable relation matrixes is adopted, and a method of processing and establishing an array rotation invariable relation through the multiplication and addition of the matrixes is only used, so that a sensor antennaarray quickly tests incoming wave directions of a single or a plurality of wireless transmission signals; and compared with the prior art, the method has the advantages that the processing speed is high, the accuracy of testing the incoming wave direction angles is obviously improved particularly when the signal to noise ratio is low, and the method has the characteristics of low requirements forequipment and hardware performance, quick and accurate test on target incoming wave directions, high accuracy, short flow, low operating cost, wide application range and the like.

Description

technical field

[0001] The invention belongs to the field of measuring the direction of arrival of a wireless propagation signal by using a sensor antenna array, in particular a method of rapidly measuring the direction of arrival of a single or multiple wireless propagation signals by using the rotation invariance (ESPRIT) of the antenna array ( orientation) method. This method can be used to perform rapid determination (orientation) without performing multiple eigenvalue decompositions in order to obtain a rotation-invariant relationship matrix, and can obtain better results (accuracy) and reduce measurement costs. Background technique

[0002] Antenna array signal processing techniques for receiving wirelessly propagated signals have been widely used. Array signal processing is to arrange a group of sensors in different positions in space according to certain rules to form a sensor array, receive through multiple channels, and use certain airspace processing or space-tim...

Examples

Embodiment Construction

[0044] In this embodiment, the wireless propagation signal is independent of each other (incoming waves) under the background of spatial Gaussian white noise. The antenna array is a uniform linear array, and each array element is an omnidirectional antenna. The number is M=16, and the interval between the array elements is d=0.083 meters; in this embodiment, the signal source is a far-field narrowband signal from K=3 different directions, and is a carrier of the same frequency, and its wavelength is Λ= 0.166 meters, and the three signal sources are respectively at the angle θ 1 =20°, θ 2 =30°, θ 3 =40° incident to the uniform linear array of the sensor; for the same signal source in two adjacent array elements, the phase delay of the subsequent array element compared to the previous array element is: φ i =2πd sinθ i / / Λ=πsinθ i ; The number of sampling snapshots is N=1024, and the signal-to-noise ratio SNR=-15dB.

[0045] Step A. Divide the sub-arrays and establish the si...

technical field

[0001] The invention belongs to the field of measuring the direction of arrival of a wireless propagation signal by using a sensor antenna array, in particular a method of rapidly measuring the direction of arrival of a single or multiple wireless propagation signals by using the rotation invariance (ESPRIT) of the antenna array ( orientation) method. This method can be used to perform rapid determination (orientation) without performing multiple eigenvalue decompositions in order to obtain a rotation-invariant relationship matrix, and can obtain better results (accuracy) and reduce measurement costs. Background technique

[0002] Antenna array signal processing techniques for receiving wirelessly propagated signals have been widely used. Array signal processing is to arrange a group of sensors in different positions in space according to certain rules to form a sensor array, receive through multiple channels, and use certain airspace processing or space-tim...

Examples

Embodiment Construction

[0044] In this embodiment, the wireless propagation signal is independent of each other (incoming waves) under the background of spatial Gaussian white noise. The antenna array is a uniform linear array, and each array element is an omnidirectional antenna. The number is M=16, and the interval between the array elements is d=0.083 meters; in this embodiment, the signal source is a far-field narrowband signal from K=3 different directions, and is a carrier of the same frequency, and its wavelength is Λ= 0.166 meters, and the three signal sources are respectively at the angle θ 1 =20°, θ 2 =30°, θ 3 =40° incident to the uniform linear array of the sensor; for the same signal source in two adjacent array elements, the phase delay of the subsequent array element compared to the previous array element is: φ i =2πd sinθ i / / Λ=πsinθ i ; The number of sampling snapshots is N=1024, and the signal-to-noise ratio SNR=-15dB.

[0045] Step A. Divide the sub-arrays and establish the si...

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