Method and device for receiving communication signal of thinned array antenna system

Abstract

The invention discloses a method and device for receiving a communication signal of a thinned array antenna system. The method comprises the following steps of: (1) setting the positions of array elements; (2) receiving a signal; (3) performing spectrum peak search; (4) performing angle iteration; and (5) processing the received signal. According to the invention, the subspace power spectrum of the signal is obtained by performing spectrum peak search on the received signal according to a multiple-signal classification formula, the angles corresponding to all high spectrum peak values therein are sequentially selected and iterated, then an angle is selected according to the output power as the direction of arrival, the obtained adaptive weight vector is multiplied by the received signal, and the signals of all array elements are overlapped and output. The method and device disclosed by the invention can adapt to a thinned array receiving system in any arrangement, and can effectively offset the time delay generated by the array while avoiding influence of a pseudo peak on the received signal.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method and a device for receiving communication signals by a sparse array antenna system in the field of array signal processing. The invention can be used for array antennas in a communication system to receive communication signals, realize arbitrary arrangement of receiving antenna arrays, and effectively offset the time delay generated by the arrays. Background technique [0002] In the communication system, the antenna beam has strong directivity, low side lobe, and is easy to realize electronic scanning and beam forming. Array antennas have been widely used. Sparse arrays have higher resolution than uniform arrays and less interference between array elements. , The number of array elements is small and the cost of the system is saved, so many scholars have done a lot of theoretical research and experimental simulation tests on sparse array antennas. The resea...

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Problems solved by technology

However, this method still has some disadvantages: First, this method is only for uniform ultra-sparse array antennas, and is not suitable for sparse array antennas arranged arbitrarily, which has certain limitations

Second, this method needs to use three signals with different frequencies and whose wavelengths are all smaller than the array element interval for detection, and also needs to use other information to identify the direction of arrival of the received signal, which will increase the complexity of the communication system to a certain extent Spend

Third, the angle estimated by this method is not accurate enough, and the weight vector designed by the estimated angle cannot effectively offset the time delay generated by the array

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