Signaling indication method of uplink precoding matrix in LTE-A system

A precoding matrix, LTE-A technology, applied in the field of communication, can solve problems such as precoding matrix index feedback and inability to achieve precoding.

Inactive Publication Date: 2016-01-20
深圳市恒程汇文化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, in the uplink of the LTE-A system, at this time, the terminal acts as the transmitting end and the base station acts as the receiving end, and the feedback of the precoding matrix index has not yet been realized, so that the precoding technology cannot be realized.

Method used

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  • Signaling indication method of uplink precoding matrix in LTE-A system
  • Signaling indication method of uplink precoding matrix in LTE-A system
  • Signaling indication method of uplink precoding matrix in LTE-A system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In the uplink, the user terminal acts as the transmitting end, the base station acts as the receiving end, and the base station uses N bits (bits) in the downlink control information (DCI, Downlink Control Information) as the feedback PMI signaling (that is, the precoding matrix index information, the downlink same), used to instruct the user terminal to select a precoding matrix.

[0071] According to the number of transmitting antennas of the terminal and the number of transmitted codewords, it can be divided into the following four situations:

[0072] (1) When the number of transmitting antennas is 2 and the number of transmitted codewords is 1, N=3, and the expressable index value (Index) ranges from 0 to 7; use the index value a to indicate that the terminal adopts a precoding matrix of layer 1 1 1 T / ...

Embodiment 2

[0081] In the uplink, the user terminal acts as the transmitting end, and the base station acts as the receiving end. The base station uses N bits (bits) in the downlink control information (DCI, Downlink Control Information) as feedback PMI signaling to instruct the user terminal to select precoding matrix.

[0082] According to the number of transmitting antennas of the terminal and the number of transmitted codewords, it can be divided into the following four situations:

[0083] (1) When the number of transmitting antennas is 2 and the number of transmitted codewords is 1, N=3, and the expressable index value (Index) ranges from 0 to 7; use the index value a to indicate that the terminal adopts a precoding matrix of layer 1 1 1 T / 2 Perform precoding, and use the index value b to instruct the t...

Embodiment 3

[0091] In the uplink, the user terminal acts as the transmitting end, and the base station acts as the receiving end. The base station uses N bits (bits) in the downlink control information (DCI, Downlink Control Information) as feedback PMI signaling to instruct the user terminal to select precoding matrix.

[0092] According to the number of transmitting antennas of the terminal and the number of transmitted codewords, it can be divided into the following four situations:

[0093] (1) When the number of transmitting antennas is 2 and the number of transmitted codewords is 1, N=3, and the expressable index value (Index) ranges from 0 to 7; use the index value a to indicate that the terminal adopts a precoding matrix of layer 1 1 1 T / 2 Perform precoding, and use the index value b to instruct the t...

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Abstract

The present invention discloses a method, base station and terminal for signaling indication of uplink precoding matrix in Long Term Evolution Advance (LTE-A) system, wherein the method includes: through the downlink control information, the base station feeds back the Precoding Matrix Index (PMI) information indicating the terminal to perform the precoding to the terminal. The present invention can use the base station to feed back the PMI used in the uplink precoding, through the downlink control information in the LTE-A system with Single User Multiple Input Multiple Output (SU-MIMO), and further can implement the uplink precoding of the LTE-A system.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a signaling indication method of an uplink precoding matrix of an LTE-A system. Background technique [0002] In wireless communication, if there are multiple antennas at the sending end and the receiving end, spatial multiplexing technology can be used to obtain a higher data rate, that is, the same time-frequency resource is used at the sending end to send multiple data streams. At the receiving end, the channel coefficient matrix can be obtained through channel estimation, and then the data on each stream can be demodulated. [0003] The precoding technique (Precoding) is a technique for preprocessing a signal at a transmitting end by using channel state information (CSI, ChannelStatusInformation) to improve the performance of a multi-antenna system. Using precoded MIMO (MultipleInputMultipleOutput, multiple input multiple output) communication system such as figure 1 As s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04B7/04H04L1/00
CPCH04B7/0639H04L1/06
Inventor 王瑜新郝鹏喻斌朱鹏
Owner 深圳市恒程汇文化科技有限公司
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