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Multi-input/multi-output communication method and system

A communication method and technology of a communication system, applied in the field of wireless communication, can solve problems such as limited performance improvement of MIMO systems, and achieve the effect of improving effective throughput and improving efficiency

Active Publication Date: 2008-07-02
HUAWEI TECH CO LTD
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Problems solved by technology

[0011] In short, the above mechanisms can only improve the performance of MIMO systems to a limited extent.

Method used

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  • Multi-input/multi-output communication method and system

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Embodiments of the present invention provide an integrated limited feedback design framework for MIMO systems in slow fading and spatially correlated channels. The feedback strategy (CSI space partitioning) and the transmission strategy (including MCS, mode selection and precoder) are jointly designed to optimize the average effective throughput of the system. The limited feedback design framework improves the efficiency of feedback and the effective throughput of the system.

[0032] In a preferred embodiment of the present invention, the process of online self-adaptation is as follows figure 1 as shown,

[0033] Divide the receiving end CSI space into 2 in advance C fb Non-overlapping areas (hereinafter referred to as CSI areas), set the transmission ...

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Abstract

The invention relates to a wireless communication field and discloses a communication method based on MIMO and a system thereof. The invention can promotes the performance of an MIMO system under the condition of limited CSI feedback. Region to which CSI of a receiver belongs currently is notified to a sender and according to a preset, the sender uses a modulation coding proposal, a mode selection and a pre-coder corresponding to the region for transmitting the data. The sender notifies the receiver about frame numbers which starts to feed back, quantity of the feeding back frames and series number of sub-channels which need to be fed back through a request message; according to parameters in the request messaged, the receiver feeds back the series number of the sub-channels and information about the region where the CSI of the sub-channel belongs through a response message.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to Multiple Input Multiple Output (Multiple Input Multiple Output, "MIMO" for short) technology. Background technique [0002] MIMO is one of the cutting-edge communication technologies currently developing. Theoretically, it has been proved that the use of multiple transmitting antennas can divide the wireless channel into multiple parallel narrowband channels, which has the potential to increase the channel bit transmission rate, and the research results show that the channel capacity increases linearly with the number of antennas. Compared with receive diversity and smart antennas, the MIMO system can not only provide diversity gain and array gain, but also improve system capacity by using Space Division Multiplex (SDM for short). [0003] Channel state information (Channel State Information, "CSI" for short) is very important to a MIMO system. CSI includes CSIR at...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/04
CPCH04B7/0417H04B7/0626H04B7/0643
Inventor 伍天宇莫燊明刘坚能吕林军
Owner HUAWEI TECH CO LTD
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