CQI estimation method, system and device during multi-stream beamforming transmission

A beamforming and estimation module technology, applied in transmission system, digital transmission system, diversity/multi-antenna system, etc., can solve problems such as inaccurate CQI
CN101753187BActive Publication Date: 2013-08-07DATANG MOBILE COMM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DATANG MOBILE COMM EQUIP CO LTD
Publication Date
2013-08-07

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Abstract

The invention provides a channel quality indicator CQI estimation method during multi-stream beamforming transmission, which comprises the following steps: a base station receives a CQI which is fed back by an user equipment UE and estimated by the UE according to a signal of a common pilot port indicated by broadcast information; the base station estimates uplink channel information according toan uplink detection signal sent by the UE; and the base station obtains the actual CQI of each beamforming data stream according to the CQI fed back by the UE and the estimated uplink channel information. The base station can estimate the reasonable CQI during the multi-stream beamforming transmission by adopting the method, thereby being conductive to leading the base station to select the appropriate MCS for the UE and further ensure the normal data transmission.
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Description

technical field

[0001] The present invention relates to the technical field of mobile communication, in particular to a CQI (Channel Quality Indicator, Channel Quality Indicator) estimation method, system and device during multi-stream beamforming transmission. Background technique

[0002] In the LTE (Long Term Evolution, long-term evolution) system, the common pilot is common to the cell, and there are currently 4 ports of the common pilot signal, such as figure 1 As shown, it is a schematic diagram of LTE system common pilot mapping in the prior art, which is sent on the full bandwidth. The dedicated pilot is based on UE (User Equipment, user equipment), that is, each user can only receive its own dedicated pilot signal. In the LTE-R8 system, the port number of the dedicated pilot is 5, such as figure 2 As shown, it is a schematic diagram of dedicated pilot mapping in the prior art, and the time-frequency resource occupied by the dedicated pilot does not conflict with ...

Claims

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