Single-antenna receiver direction finding method using multiple antennas to synchronously emit different signals

Abstract

The invention belongs to the technical field of electronic information, and especially relates to a single-antenna receiver direction finding method using multiple antennas to synchronously emit different signals. According to the invention, first of all, time-domain sampling is performed on signals emitted by multiple radio emitters and receiving signals of a single-antenna receiver in set multiple time, and a time-domain sampling sequence of the signals emitted by each emitter and a time-domain sampling sequence of the signals received by the receiver at each time are respectively obtained; then, a time-domain sampling matrix is formed by integrating the time-domain sampling sequences of the emitters, and next, an inversion calculation is performed on the time-domain sampling matrix of the emitted signals; and finally, inner product operation is performed on driving vectors formed after grid dividing is performed on an estimated emission array driving vector and a spatial domain to be searched according to angles, and an angle corresponding to a maximum value is determined. According to the invention, since only one single antenna is employed at a receiving end, the disadvantage of small volume of a motion platform is overcome; and only one emission array is needed so that the cost for orientation correction of multiple motion platforms is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and relates to a direction finding method using a multi-input single-output radio system. Background technique [0002] In the radio signal receiving system, when an array composed of multiple array elements receives radio signals such as electromagnetic waves and sound waves, there is a certain phase error between the incoming wave signal received by each array element and a designated reference array element. Since there is a one-to-one relationship between the direction of arrival of the signal and the phase difference, the array direction finding technology can be designed by using this relationship, and the array direction finding can be realized by processing the signal received by the array. Among the existing direction finding methods based on this principle, there are typically multiple signal classification (MUSIC, Multiple Signal Classification) algorithms, signal parame...

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Problems solved by technology

[0003] The disadvantages of the above method are: (1) The number of source angles that can be measured cannot exceed the number of elements of the receiving array; (2) The direction resolution is limited by the aperture of the antenna array. When the source angles are too close, the above The algorithm cannot correctly resolve the angle of incidence

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