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Downlink closed-loop transmitting and diversity method when uplink discontinuous transmitting of wireless system

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

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

Problems solved by technology

[0008] The technical problem solved by the present invention is to provide a downlink closed-loop transmit diversity method for uplink discontinuous transmission in a TDD wireless system, so as to overcome the disadvantage 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 closed-loop transmitting and diversity method when uplink discontinuous transmitting of wireless system
  • Downlink closed-loop transmitting and diversity method when uplink discontinuous transmitting of wireless system

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Embodiment Construction

[0021] The specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 2 Shown is the flow chart of the inventive method, and concrete steps are as follows:

[0023] Step 1: The uplink is in a non-DTX state, and the base station uses a conventional closed-loop transmit diversity method to calculate antenna weights, weights the antennas, and transmits corresponding downlink signals;

[0024] Step 2: When the uplink enters the DTX state, the base station measures the uplink Special Burst (SB) signal quality received by the two antennas respectively in each SBGP period, and selects the antenna with better received signal quality as the SBGP For the corresponding downlink signal transmitting antennas in the period, the process of step 2 is continuously carried out cyclically during the uplink DTX period, that is, the downlink transmitting antenna is selected once every SBGP peri...

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Abstract

The present invention discloses down closed loop transmitting 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 takes the measurements to two aerials respectively received uplink SB signal quality in each SBGP cycle, selecting aerial with preferable signal receiving quality as down link signal transmission aerial in relevant SBGP cycle, 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.Said method raises downlink performance in uplink DTX state.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a downlink closed-loop transmission diversity method during uplink discontinuous transmission in a TDD wireless communication system. 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. The transmit diversity of the TDD mode of the third-generation mobile communication system uses 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 the received signal. [0003] 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 Transmi...

Claims

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Application Information

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