A Low Complexity Antenna Selection Method

Abstract

The invention relates to the technical field of mobile communication, and particularly relates to a low-complexity antenna selection method. According to the scheme of the invention, only the processof traversing a selection combination of antennae at a receiving end is required, namely, a process of performing traversal search for formula (as shown in the description) times is carried out, the number of searches can be greatly reduced, the search speed can also be improved, and the search complexity of the entire system can be greatly reduced in the case that the number of the antennae at the receiving end has a small difference from the number of radio frequency channels at the receiving end. Moreover, the criterion of antenna selection in the invention is based on the idea of obtainingthe channel gain of a wireless channel as many as possible. Thereby, the selected antenna combination can obtain better channel gain, and the reliability of the transmission of a wireless communication system can be ensured. In addition, according to the scheme of the invention, an optimal antenna selection combination can be adaptively selected according to a channel matrix of the wireless channel, and a larger system capacity can be obtained.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a low-complexity antenna selection method. Background technique [0002] Nowadays, in the field of mobile communication, the MIMO communication system with multiple antennas transmitting and multiple antennas receiving with efficient frequency utilization and high communication quality has been widely used. In the prior art, actual physical antennas are connected to radio frequency channels, and generally the number of radio frequency channels is less than or equal to the actual number of physical antennas due to cost reasons. For scenarios where the number of radio frequency channels is less than the number of physical antennas, it is necessary to design an antenna selection scheme to complete the mapping from radio frequency channels to actual antennas. In the prior art, better performance is obtained by increasing the number of physical antennas. However, due to ...

AI Technical Summary

Problems solved by technology

There are two existing technical solutions. One is to traverse all possible options. It is necessary to traverse all combinations and send data to try out the antenna combination with optimal performance, which wastes system resources, and due to the time-varying nature of wireless channels, It is not necessarily guaranteed that the antenna selection scheme with the best performance tested can be continuously optimal; in addition, it is necessary to conduct traversal search times, when N r with N pr , N t with N pt When the gap is large, the number of searches will become very large, and the complexity of the solution implementation is high

Another relatively low-complexity antenna selection scheme is random selection, directly from N r N pr and from N t N pt , the implementation of this scheme is simple, but it cannot guarantee the performance of the system and the reliability of the transmission of the wireless communication system

[0004] The patent document with the patent application number 200510090890.0 describes a method for array antenna selection, which uses a layered antenna selection method of geometric projection, avoiding a large number of determinant calculations and global searches for all possible antenna combinations, but it still cannot Guaranteed system performance

The patent document with the patent application number 201611148927.5 describes a port and antenna selection method for a distributed MIMO system, which does not directly select the antenna, but selects the port first, and then selects the antenna from the selected port, which reduces the The range of antenna selection, but the implementation complexity of the solution is still relatively high

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