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
CN1829116AInactive Publication Date: 2006-09-06ZTE CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
ZTE CORP
Publication Date
2006-09-06
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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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