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Suboptimal multi-user multiplexing method under condition of full cell load and emitting device

A transmitting device, full load technology, applied in the direction of space transmit diversity, diversity/multi-antenna system, power management, etc.

Inactive Publication Date: 2014-03-19
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

[0005] In the existing standard version of LTE, there is only transmit diversity in the case of open loop and multi-user multiplexing in the case of closed loop. Occupies a certain amount of resources, multiplexing only considers multiplexing between users with good channel conditions and low-speed movement

Method used

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  • Suboptimal multi-user multiplexing method under condition of full cell load and emitting device
  • Suboptimal multi-user multiplexing method under condition of full cell load and emitting device
  • Suboptimal multi-user multiplexing method under condition of full cell load and emitting device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0119] 4 transmit antennas, when the closed-loop user data flow is mapped to layer 2, and the open-loop user data flow is mapped to layer 2, the receiving matrix of the closed-loop user is:

[0120] y 1 = H 1 W 1 u 1 u 3 u 2 u 4 + H 1 W 2 S 1 S 2 ...

example 2

[0127] 8 transmit antennas, when the data stream of the closed-loop user is mapped to Layer 2, the receiving matrix of the closed-loop user is:

[0128] y 1 = H 1 W 1 u 1 u 3 u 2 u 4 + H 1 W 2 S 1 S 2 - ...

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Abstract

The present invention provides a method and apparatus for multi-user multiplexing. The method includes: a transmission apparatus performing layer mapping on data steams to be transmitted of an open-loop user and a close-loop user respectively; the transmission apparatus performing pre-coding processing on a layer data matrix of the open-loop user and the close-loop user obtained by the layer mapping; and the transmission apparatus mapping the layer data matrix after the pre-coding processing to a plurality of transmission antennas to be sent. The method of the present invention can improve frequency spectrum utilization ratio in the case of the a cell being full load or other possible scenarios, and its performance is better than the multiplexing of two close-loop users who are completely not suitable for pairing. Therefore, the method of the present invention is an optimal scheme adopted in some specified scenarios.

Description

technical field [0001] The present invention relates to a long term evolution advanced system (LTE-Advanced for short), and specifically relates to a sub-optimal multi-user multiplexing method and a transmitting device in the case of full load of cells in the LTE-Advanced system. Background technique [0002] In the LTE (Long Term Evolution Project) system, the downlink defines that the diversity method when the transmitting antenna is 2 antennas is SFBC (space frequency coding), and the coding matrix is ​​shown in Equation 1; the diversity method of 4 antennas is SFBC+FSTD (frequency switching Diversity) coding matrix is ​​shown in formula 2. [0003] Formula 1 [0004] Formula 2 [0005] In the existing standard version of LTE, there is only transmit diversity in the case of open loop and multi-user multiplexing in the case of closed loop. Occupies a certain amount of resources, and multiplexing only considers multiplexing between users with good channel conditions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/08H04W52/10H04W52/24H04B7/06H04L1/06
CPCH04L2025/03426H04L25/03343H04L1/0656
Inventor 郭森宝彭爱华魏民
Owner 深圳市恒程汇文化科技有限公司