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Multi antennae transmission method

A technology of multi-antenna transmission and multi-antenna system, which is applied in the field of multi-antenna transmission that adaptively changes the number of transmission data streams, can solve the problems of waste of antenna resources, waste of resources, and inability to change the situation of antenna grouping, so as to improve resource utilization, The effect of improving the utilization of resources

Active Publication Date: 2007-05-09
XIAOMI INC
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Problems solved by technology

[0013] The purpose of the present invention is to provide a more flexible multi-antenna transmission method to solve the technical problems in the prior art that only the transmission data rate can be changed, but the antenna grouping situation cannot be changed, and antenna resources are wasted causing resource waste.

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] In the patent application with application number 200510076921.7, a scheme of combining beamforming technology and MIMO technology by using antenna grouping technology is disclosed. As shown in Fig. 2, a uniform linear array of 8 units is taken as an example. From left to right, the original array units can be divided into 4 groups for each group of two. If the same data is sent on the two antenna units in each group and weighted accordingly, each group can be regarded as a new antenna elements, thus forming a 4-element MIMO antenna array. At this time, not only the equivalent spacing of the MIMO antenna array is only increased to 1 times the wavelength, which is conducive to the parallel transmission of multi-stream data, but also the antenna weighting in each group will provide a certain performance gain. On the basis of the above-mentioned patent applicat...

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Abstract

The method includes: (1) Presets the dataflow speed threshold Xi related to the number of each transfer dataflow. Xo=0. Xi-1 less than Xi. Here, i resides in [1, Q]. Q is the max flow number supported by this multi-antenna system. (2) Receiving end calculates CQI and Y. CQI is the channel quality indication related to each received data. Y is the sum of transfer block sizes of all CQI. Then compares Y with Xi to obtain b, which is flow number related to Xa, when Y resides in range [Xa-1, Xa]. Here, Xa-1 or Xa is one of the dataflow speed thresholds. (3) If value b received by sending end (SE) is different from number transferred by the last dataflow, then splits antennas of SE into b groups. Then each dataflow sends via related antenna unit of this group. SE also can calculate Y value and decides the sent flow number b. The invention can self-adaptively change the sent flow number depending on channel condition. This will raise resource utility. Weighting on antennas of each group will increase feature gain.

Description

technical field [0001] The invention relates to the communication field, in particular to a multi-antenna transmission method for adaptively changing the number of transmission data streams. Background technique [0002] With the development of MIMO (Multiple Input Multiple Output) technology, multiple transmitting antennas and multiple receiving antennas can be used in wireless communication systems to transmit high-speed data, and it will become a trend in the development of wireless communication technology in the future. This technique is suitable for wireless environments with multiple scatterers, so that the signal from each transmit antenna is highly uncorrelated in each receive antenna, and uses this uncorrelation at the receive end to distinguish data transmitted by multiple antennas and detection. For example, MIMO technology and smart antenna technology are combined for data stream transmission to improve data transmission rate and performance gain. [0003] Ple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04L1/06
Inventor 索士强王可王映民
Owner XIAOMI INC
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