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Codebook generating method and apparatus for MIMO channel

A multi-output, multi-input technology, applied in the field of MIMO channel codebook generation, can solve problems such as MIMO channel incompatibility

Active Publication Date: 2008-12-31
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] Embodiments of the present invention propose a method and device for generating a codebook for a MIMO channel to solve the problem that the MIMO codebook generated in the prior art does not correspond to the actual MIMO channel

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  • Codebook generating method and apparatus for MIMO channel
  • Codebook generating method and apparatus for MIMO channel

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Embodiment Construction

[0014] Below in conjunction with the accompanying drawings and examples, the specific embodiments of the present invention will be described in further detail:

[0015] The embodiment of the present invention proposes a new method for generating a MIMO codebook, which obtains a corresponding MIMO codebook with a specific MIMO channel distribution function, thereby ensuring that the generated MIMO codebooks are all suitable for corresponding MIMO channels.

[0016] Among them, the unitary space is a linear space on the complex number field, and a binary complex function is defined on V, called the inner product, denoted as (α, β), which has the following properties: 1, (α, β) = ( β, α) (β, α) is the complex conjugate of (β, α); 2, (kα, β)=k(α, β); 3, (α+β, γ)=(α, γ) +(β, γ); 4, (α, α) are non-negative real numbers, and (α, α)>0 when α≠0. Among them, α, β, γ are any vector in V, and k is any complex number, such a linear space is called a unitary space.

[0017] In order to cl...

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Abstract

The invention discloses a codebook generating method of a multi-input and multi-output channel, including the following steps: the probability distribution function of an MIMO channel is acquired by an MIMO channel transmission matrix; the mean quantization error of the system is calculated according to the probability distribution function of the MIMO channel; the codebook is acquired according to the mean quantization error of the system, and the codebook is a set of vectors which lead the mean quantization error of the system to be minimum. The invention also discloses a codebook generating device of the multi-input and multi-output channel, which comprises an acquisition module, a calculation module and a codebook determination module. The codebook acquired by the embodiment of the invention corresponds to the MIMO channel distribution function, thus ensuring that all the generated MIMO codebooks are applicable to the corresponding MIMO channel; furthermore, by the definition and the use of the unitary space distance function, the method of the invention overcomes the defect that the codebook deduction can be conducted only when the dependency of the channel is zero in the prior art.

Description

technical field [0001] The present invention relates to the technical field of mobile communications, and in particular, to a method and device for generating a codebook for a MIMO (Multiple-Input Multiple-Output, Multiple Input Multiple Output) channel. Background technique [0002] MIMO technology is a technology under consideration for 802.11n. The technology was first proposed by Marconi in 1908. It uses multiple antennas to suppress channel fading to improve spectrum utilization, enabling the system to transmit higher-speed data services in a limited wireless frequency band. [0003] When applying the MIMO technology, the coefficients corresponding to all possible MIMO channel conditions are pre-generated in a codebook format. The codebook is predefined and consists of all the coefficient matrices that may reflect the channel characteristics. In this way, after estimating the MIMO channel coefficients, only the labels of the corresponding matrices and columns need to ...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04L1/06H04L1/00
Inventor 李立华武平张平金炜
Owner HUAWEI TECH CO LTD
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