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Downlink transmitting and diversity method for supporting uplink discontinuous transmitting wireless system

A technology of transmit diversity and wireless systems, applied in the directions of space transmit diversity, diversity/multi-antenna systems, etc., can solve the problem that the downlink cannot perform downlink diversity, and achieve the effect of improving performance

Inactive Publication Date: 2006-09-06
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0010] The technical problem solved by the present invention is to provide a downlink transmit diversity method of a TDD wireless system supporting uplink DTX, which overcomes the shortcoming that the downlink of a TDD base station adopting closed-loop transmit diversity cannot perform downlink diversity during uplink DTX

Method used

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  • Downlink transmitting and diversity method for supporting uplink discontinuous transmitting wireless system
  • Downlink transmitting and diversity method for supporting uplink discontinuous transmitting wireless system
  • Downlink transmitting and diversity method for supporting uplink discontinuous transmitting wireless system

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Embodiment Construction

[0027] The specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] like image 3 Shown is the flow chart of the inventive method, and concrete steps are as follows:

[0029] Step 1: When the uplink is not DTX, the base station uses the conventional closed-loop transmit diversity (CLTD) method to calculate the antenna weight, weight the antenna and transmit the corresponding downlink signal;

[0030] Step 2: When the uplink enters the DTX state, the base station uses time switching diversity (TSTD) to transmit corresponding downlink signals;

[0031] Step 3: The uplink exits the DTX state, and the base station resumes using the conventional closed-loop transmit diversity method to calculate (CLTD) antenna weights, weights the antennas and performs corresponding downlink signal transmission, and turns to step 1.

[0032] The above method is implemented by the base station for each uplink...

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Abstract

The present invention discloses down transmission diversity method in uplink discontinuance transmission of wireless system. It contains 1, when uplink is not DTX, base station utilizes regular closed loop transmission diversity method to calculate aerial weight(ed) value, weighing aerial and to proceed relevant down link downgoing signal transmission, 2, when uplink enters DTX state, base station utilizing time switching diversity to proceed relevant down link signal transmission, 3, when uplink exits DTX state, base station recovering utilizing regular closed loop transmission diversity method to calculate aerial weight(ed) value, weighing aerial and to proceed down link downgoing signal transmission, and changing to step 1.Adopting said method, closed loop transmission diversity base station diversity mode is switched to down time switching diversity to make downlink performance to obtain certain down diversity gain in both of uplink DTX and non - DTX.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a downlink transmission diversity method of a TDD wireless system supporting uplink DTX. Background technique [0002] Diversity technology is an important anti-fading technology, which is widely used in mobile communication, especially in the third generation mobile communication system. Transmit diversity in the TDD mode of the third-generation mobile communication system is to use two antennas, separated by a certain distance, to transmit separately in time or space, so that the receiving end can use the independence of the two signals to improve the quality of signal reception. In the UTRA (Universal Telecommunication Radio Access) TDD 1.28Mcps system, the supported transmit diversity modes include Time Switched Transmit Diversity (TSTD), Closed-Loop Transmit Diversity (CLTD) and Space Code Transmit Diversity (SCTD), where the TSTD and CLTD modes are The influ...

Claims

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Application Information

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IPC IPC(8): H04B7/06
Inventor 马毅华肖炼斌
Owner ZTE CORP
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