Method of enhancing down-link performance of TD-LTE by antenna selection

Abstract

The invention provides a method of enhancing the down-link performance of TD-LTE, which relates to a wireless communication system. The method comprises the following steps that the number of antennaeThe invention provides a method of enhancing the down-link performance of TD-LTE, which relates to a wireless communication system. The method comprises the following steps that the number of antennae to be selected is confirmed on the basis of a maximized capacity criterion; the antenna subset selection and the minimum singular value calculation are carried out; the precoding matrix and the signato be selected is confirmed on the basis of a maximized capacity criterion; the antenna subset selection and the minimum singular value calculation are carried out; the precoding matrix and the signal-to-noise ratio are solved on the basis of a ZF criterion; transmission antennae are selected on the basis of a minimum error rate criterion; and finally, a base station finishes the sending of downwl-to-noise ratio are solved on the basis of a ZF criterion; transmission antennae are selected on the basis of a minimum error rate criterion; and finally, a base station finishes the sending of downward information. When the relativity of an antenna unit at the sending terminal exists, the number of the antennae is confirmed on the basis of the maximized capacity criterion, the transmission antenard information. When the relativity of an antenna unit at the sending terminal exists, the number of the antennae is confirmed on the basis of the maximized capacity criterion, the transmission antennae are selected on the basis of the minimum error rate criterion, and the adverse effect to MIMO and the precoding from the antenna relativity can be eliminated or weakened, thereby the capacity of tnae are selected on the basis of the minimum error rate criterion, and the adverse effect to MIMO and the precoding from the antenna relativity can be eliminated or weakened, thereby the capacity of the down-link of the TD-LTE system is increased, and the error ratio of the TD-LTE system is reduced; in addition, the number of radio frequency parts at the sending terminal of the TD-LTE system can bhe down-link of the TD-LTE system is increased, and the error ratio of the TD-LTE system is reduced; in addition, the number of radio frequency parts at the sending terminal of the TD-LTE system can be reduced, the dimensionality of the matrix which is involved in calculation during the treatment of MIMO can be ensured to be less, and the realization complexity and the cost are also reduced.e reduced, the dimensionality of the matrix which is involved in calculation during the treatment of MIMO can be ensured to be less, and the realization complexity and the cost are also reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for enhancing the performance of a TD-LTE downlink system. Background technique [0002] With the rapid development of computer technology and network communication technology, the demand for broadband high-speed data communication services is constantly increasing. Due to the limited wireless spectrum resources available, high data rates can only be achieved with efficient signal processing. According to the results of information theory, wireless multiple-input multiple-output (MIMO) systems can significantly improve the capacity and spectrum utilization of communication systems without increasing the bandwidth. Due to the huge capacity potential of the MIMO system, it has become an important technology to solve wireless high-speed data transmission. At present, in MIMO research, it is generally assumed that the channel is a complex Gaussian variable w...

AI Technical Summary

Problems solved by technology

However, there are still relatively few studies on antenna selection applied to LTE systems with antenna correlation, and there is no better algorithm applied to LTE systems with MIMO and precoding

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