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A transmit diversity method, terminal and base station

A transmit diversity and base station technology, applied in the field of communication, can solve problems such as inability to obtain beamforming gain, blocked beams, narrow beams, etc.

Active Publication Date: 2021-10-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the next-generation wireless communication system, in order to resist the severe fading of high-frequency signals, the number of antennas will be further increased, which will cause the beam to become narrower and prone to the problem of beam being blocked
In the prior art, the beam directions corresponding to the two ports of SFBC are basically the same, so when beam blocking occurs, the beams of the two ports will be blocked, seriously affecting the transmission performance
In addition, the data or DM-RS of each port is only precoded by multiple antennas in one polarization direction, and the beamforming gain when all antennas in two polarization directions are precoded together cannot be obtained

Method used

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  • A transmit diversity method, terminal and base station
  • A transmit diversity method, terminal and base station
  • A transmit diversity method, terminal and base station

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Embodiment approach 2

[0110] Embodiment 2 may be adopted when the UE receiving the reference signal sent by the base station includes the UE receiving M reference signals sent by the base station through M antenna ports. The M reference signals are respectively associated with a precoding vector, where M is an integer greater than or equal to 2; the association here may mean that each of the reference signals is precoded by a precoding vector corresponding to the reference signal reference signal, the precoding vector is the precoding vector of the port that transmits the reference signal; in this case, the PMI is used to indicate two antenna ports among the M antenna ports, and the two The interval between the port numbers of the antenna ports is n, where the value of n is greater than or equal to 1. For example, in the case of four ports, the base station sends reference signals to the UE through four antenna ports port0, port1, port2, and port3, where port0 and port1 are the first and second por...

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Abstract

The present invention provides a method and device for information feedback. The method includes: receiving signaling sent by a base station, the signaling being used to indicate feedback of channel state information based on transmit diversity; sending feedback information to the base station, the feedback information Precoding indication information PMI is included, wherein the PMI is used to indicate the precoding matrix in the precoding matrix set, and the structure of the precoding matrix is ​​one of two specific structures. According to the feedback method and device of the present invention, the problem of beam being blocked can be effectively avoided, and the performance of transmission can be improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to precoding information transmission and feedback technology. Background technique [0002] In a wireless communication system, the transmitting end (for example, a base station) can obtain channel status information (CSI) in some way, and can optimize the signal to be transmitted according to the channel characteristics, so as to improve the quality of signal reception and improve the overall system performance. [0003] However, in the FDD system, the CSI can only be accurately obtained at the receiving end. The transmitting end needs to obtain CSI, and the receiving end needs to feed back CSI-related information to the transmitting end. For example, in a long term evolution (long term evolution, LTE for short) system, a user equipment (user equipment, UE for short) does not directly feed back channel information, but recommends a precoding matrix to a transmitting end, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/0456
CPCH04B7/0456H04B7/063H04B7/0639H04B7/0626H04B7/0417H04L5/0048
Inventor 刘鹍鹏李雪茹曲秉玉
Owner HUAWEI TECH CO LTD