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

A beamforming and joint estimation technology, applied in transmission systems, digital transmission systems, diversity/multi-antenna systems, etc., can solve problems such as inaccurate CQI, and achieve the effect of improving data transmission throughput

Active Publication Date: 2010-06-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to at least solve one of the above-mentioned technical defects, especially solve the defect that the CQI estimated by the base station is inaccurate during multi-stream beamforming transmission in the prior art

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

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0029] The main purpose of the present invention is that after receiving the public pilot and the dedicated pilot and estimating the corresponding signal-to-noise ratio, the UE jointly estimates the signal-to-noise ratio of the common pilot and the dedicated pilot to obtain the CQI and feeds it back to the base station, so that the base station can A relatively accurate CQI of each data stream is obtained.

[0030] The present invention proposes a channel quality indicator (CQI) estimation method during multi-stream beamforming transmiss...

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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: an user equipment UE receives a common pilot and a special pilot sent by a base station; the UE carries out CQI combined estimation on the common pilot and the special pilot according to the number of data streams or the number of code words of beamforming transmission for obtaining the corresponding CQI; and the UE sends the CQI to the base station. The invention further provides a CQI estimation system and a device during the multi-stream beamforming transmission. 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 each data stream of the UE and effectively improving the data transmission throughput of the system.

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 equipment 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 in the figure, R 0 ~R 3 represent the common pilot signals on antenna ports 0 to 3, respectively. Among them, Figure A is the common pilot signal mapping pattern under the normal CP (normal CP) condition, and Figure B is used for the common pilot signal mapping pattern under the extended CP (extended CP) condition. The dedicated pilot symbols are only used in the data part of the physical resource block PRB allocated to the user for beamforming. The dedicated pilot is based on UE (User Equipment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/42H04B7/04H04L1/00
Inventor 缪德山喻晓冬秦飞陈文洪
Owner DATANG MOBILE COMM EQUIP CO LTD
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