Method, system and device for enhancing throughput performance of SDMA access system

Abstract

The invention discloses a method for improving the throughput performance of a spatial division multiple access SDMA system, a system and a device thereof, wherein the method comprises: receiving feedback information which is sent by user terminals by a base station, wherein the information comprises: receiving first choice beam number of the user terminals in a precoding codebook, channel vector module value relevant information and phase difference information corresponding to first choice beams, adopting a set estimation algorithm by the base station according to received feedback information and space relevant information between base station multi-antennae, estimating the sum throughput which is supported by a current SDMA system under each sending mode, selecting a sending mode of the sum throughput corresponding to the maximum value, and adopting the sending mode to send data. Thereby, the method, the system and the device which are provided by the embodiment of the invention can improve the sending performance of an SDMA access system.

Description

technical field [0001] The invention relates to the field of space division multiple access (SDMA) access technology, in particular to a method, system and device for improving throughput performance in an SDMA access system. Background technique [0002] In a multi-antenna broadcast channel, space resources can be used to send data to multiple user terminals at the same time. This technology is called SDMA. Compared with traditional time division multiple access (TDMA) access, it can double the system throughput. Studies have shown that when sending data to multiple user terminals, space resources can be allocated through Dirty Paper Coding (DPC), which can make SDMA achieve optimal performance, but this scheme is not feasible due to its high complexity and non-causality. practical. At present, in SDMA, the commonly used method of allocating space resources is to adopt low-complexity multi-user precoding technology, such as zero-breaking (ZF) multi-user precoding technolog...

AI Technical Summary

Problems solved by technology

However, due to the lack of sufficient broadcast channel information in base stations with limited feedback SDMA technology, most of the data transmission schemes of existing SDMA access systems assume that each parallel user terminal transmits signals with equal power, which will cause a certain loss in transmission performance

Furthermore, in a sparse SDMA access system, that is, when the number of users is far less than the maximum number supported by the multi-antennas of the base station, the maximum number of parallel users supported by the multi-antennas of the base station is used to simultaneously send bearer data. The precoding codebook will cause strong interference between multiple parallel user terminals currently accessing the SDMA access system, so the throughput performance improvement of the SDMA access system is very limited

Images