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

A technology for downlink and antenna selection, applied in diversity/multi-antenna systems, communication between multiple stations, etc., and can solve problems such as algorithm application

Inactive Publication Date: 2013-01-30
CHONGQING AEROSPACE ROCKET ELECTRONIC TECH CO LTD +1
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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

Method used

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

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specific Embodiment approach

[0010] Such as figure 1 Shown is a schematic diagram of the main implementation steps of the method for enhancing the performance of the TD-LTE downlink system. The specific implementation is as follows:

[0011] Step 1: Obtain downlink channel information H

[0012] It is assumed that the channel estimation of the receiving channel (uplink, that is, from the mobile station to the base station) has been completed by various mature methods at the base station . Due to the reciprocity of the uplink and downlink channels in the TDD system, that is, the propagation characteristics of the uplink and downlink channels are basically the same, so the channel parameters of the uplink and downlink channels are basically the same, and the channel impulse response estimated by the uplink reception of the base station can be directly applied to the downlink transmission process ,vice versa.

[0013] so, . Suppose the number of transmitting antennas is Mt (Mt≥2), and the number of r...

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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 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 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 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 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 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 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.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/02H04B7/26
Inventor 谢显中刘勇王熹张波黄毅孙宗敏
Owner CHONGQING AEROSPACE ROCKET ELECTRONIC TECH CO LTD
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