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Signal transmitting method, signal transmitting device and signal transmitting system

A signal flow and mean square error technology, applied in the field of communication, can solve the problems of waste of antenna resources and poor signal reception quality

Active Publication Date: 2013-09-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the above signal transmission, after the two signal streams are directly superimposed, two antennas are used to transmit two identical superimposed signal streams, which not only wastes antenna resources, but also the user only uses one superimposed signal stream to demodulate The signal flow required by oneself makes the reception quality of the signal poor

Method used

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  • Signal transmitting method, signal transmitting device and signal transmitting system
  • Signal transmitting method, signal transmitting device and signal transmitting system
  • Signal transmitting method, signal transmitting device and signal transmitting system

Examples

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Embodiment 1

[0042] An embodiment of the present invention provides a signal transmission method, where the subject of execution of the method is a base station, such as figure 1 As shown, the method includes the following steps:

[0043] 101. Obtain a high-power precoding matrix and a low-power precoding matrix according to channel quality information.

[0044] The channel quality information includes a high-power channel matrix corresponding to a cell edge user receiving terminal and a low-power channel matrix corresponding to a cell center user receiving terminal; the high-power receiving terminal is used to receive high A power signal flow, the low-power receiving terminal is used to receive a low-power signal flow whose transmit power is not higher than a preset second power, wherein the preset first power is not lower than the preset second power. The setting of the preset first power and the preset second power depends on specific situations and is not limited here.

[0045] The b...

Embodiment 2

[0072] An embodiment of the present invention provides a signal transmission method, such as image 3 As shown, the method includes the following steps:

[0073] 301. The base station obtains a high-power precoding matrix and a low-power precoding matrix according to channel quality information.

[0074] The channel quality information includes a high-power channel matrix corresponding to a cell edge user receiving terminal and a low-power channel matrix corresponding to a cell center user receiving terminal; the high-power receiving terminal is used to receive a high-power signal stream whose transmit power is the first power , the low-power receiving terminal is used to receive a low-power signal stream whose transmission power is a second power; the first power is greater than the second power;

[0075] The base station serves two types of user terminals, one type of user terminal is a cell edge user receiving terminal, which is usually located at the edge of the cell serv...

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Abstract

The invention provides a signal transmitting method, a signal transmitting device and a signal transmitting system and relates to the technical field of communication. Different stacking manners can be used for transmitting signals in a stacking mode according to different signal channel quality, signal receiving quality is improved and system performances are enhanced. The signal transmitting method includes the following steps that a base station obtains a pre-coded matrix with high power and a pre-coded matrix with low power based on information on signal channel quality and then high-power signal flows corresponding to the pre-coded matrix with high power respectively undergo pre-coding by the base station to obtain first signal flows. Low-power signal flows corresponding to the pre-coded matrix with low power respectively undergo pre-coding by the base station to obtain second signal flows. The first signal flows and the second signal flows are stacked to obtain a stacked signal flow which is transmitted to a user terminal. The user terminal decodes the received stacked signal flow through a receiving matrix and a signal flow which is demanded by the user terminal is obtained. The signal transmitting method, the signal transmitting device and the signal transmitting system are used for transmitting signals in a multiple-input-multiple-output system.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a signal transmission method, device and system. Background technique [0002] Multiple-Input Multiple-output (MIMO) technology can double the capacity of wireless channels without increasing system bandwidth and antenna transmission power, and thus becomes a key technology for future wireless communications. [0003] In the prior art, there is a method of signal transmission in a MIMO system. Assuming that there are two transmitting antennas on the base station to serve one or more users, the base station transmits two signal streams (a high-power signal stream) to the users. , a low-power signal stream), these two signal streams directly use the same superposition method on the two transmitting antennas to form two identical superimposed signal streams and send them to the user terminal at the same time, and the user terminal demodulates one of the superimpose...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04B7/0456H04B7/0632H04L1/0045H04L25/03898H04L2001/0093Y02D30/70
Inventor 王锐刘晟杜颖钢
Owner HUAWEI TECH CO LTD