Method and device for selecting antenna polarization and coding mode in wireless communication systems

Abstract

The invention provides a method and a device for dynamically determining the polarization mode of a base station emitting antenna and the space coding mode in a multi-input and multi-output system. The base station of the multi-input and multi-output system firstly sends measurement auxiliary signals by at least one antenna polarization mode and one space coding mode to a mobile terminal under the management of the multi-input and multi-output system; the mobile terminal detects the quality of the signals after receiving the measurement auxiliary signals, generates the information correlative to the signal quality and feeds the information back to the base station; the base station determines the polarization mode of the emitting antenna and the space coding mode of data used when the base station sends subsequent signals to the mobile terminal according to the information after receiving the information correlative to the signal quality. Compared with the existing scheme of switching space coding modes in fixed antenna polarization mode, the invention can obviously improve the system capacity.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a method and device for determining the antenna polarization mode and data encoding mode in a base station of the wireless communication system, and also relates to a mobile terminal for assisting the base station to which it belongs to determine the antenna polarization mode and data encoding mode Methods and Apparatus. Background technique [0002] In the past ten years, in order to improve the efficiency of wireless communication, Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) has been widely used. [0003] In the MIMO system, Space Time Coding (STC, Space Time Coding) and Spatial Multiplexing Coding (SM, Spatial Multiplexing) are two very important diversity and multiplexing technologies. STC performs orthogonal encoding on data symbols in the time domain (Time Domain) and space domain (Space Domain). When the number of transmitting antennas i...

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Problems solved by technology

[0008] The disadvantage of statically configuring the polarization of the transmitting antenna of the base station is that when the polarization of the transmitting antenna is cross-polarized, if the received signal quality is better when STC is used as the spatial coding method through detection, STC will be selected. , however, choosing STC will make the system face problems, because in the cross-polarization mode, the signal power loss is more, and the advantages accumulated by relying on the insensitivity to spatial correlation are all offset by the performance degradation caused by power loss, making the choice of STC doesn't work as expected

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