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Method for realizing channel information feedback and device

A channel information feedback and channel information technology, applied in the field of realizing channel information feedback, can solve the problems of quantization feedback method quantization error, incomplete feedback information, etc.

Active Publication Date: 2012-01-11
射阳县射阳港对虾养殖二公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method and device for realizing channel information feedback, and solve the problems of quantization error and incomplete feedback information in the quantization feedback mode

Method used

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  • Method for realizing channel information feedback and device
  • Method for realizing channel information feedback and device
  • Method for realizing channel information feedback and device

Examples

Experimental program
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specific Embodiment 1

[0093] The channel coefficient matrix H is obtained through measurement, and the complex coefficient matrix whose dimension is [the number of receiving antennas * the number of transmitting antennas]; the matrix H is used as the matrix P to be fed back.

[0094] Take an element P in the matrix P i，j , to perform feedback-related operations.

[0095] First, calculate P i，j The modulus and argument of , where the modulus A=[P i，j |, Argument θ=arg(P i，j ).

[0096] Secondly, the numerical compression operation is performed on A to determine which range the value of A belongs to, assuming Then the compressed value

[0097] Again, perform a numerical compression operation on θ

[0098] Again, using A' and θ' as the real part and imaginary part respectively, the carrier transmission signal S=A'+θ'·j is constructed and modulated onto the OFDM carrier.

[0099] Again, select another element from the P matrix, repeat the above process, and complete the feedback of this ele...

specific Embodiment 2

[0101] The channel coefficient matrix H is obtained through measurement, and the complex coefficient matrix whose dimension is [the number of receiving antennas*the number of transmitting antennas].

[0102] Perform normalization processing on H to obtain P=H / σ, where σ is the square root of the estimated value of the interference noise power.

[0103] Take an element P in P i，j , to perform feedback-related operations.

[0104] First, calculate P i，j The modulus and argument of , where the modulus A=|P i，j |, Argument θ=arg(P i，j ).

[0105] Secondly, the numerical compression operation is performed on A to determine which range the value of A belongs to, assuming that, Then the compressed value

[0106] Again, perform a numerical compression operation on θ

[0107] Again, take A' and θ' as the real part and imaginary part respectively, and modulate them onto the OFDM carrier, that is, construct the carrier transmission signal S=A'+θ' j

[0108] Again, select anoth...

specific Embodiment 3

[0110] The channel coefficient matrix H is obtained through measurement, and the complex coefficient matrix whose dimension is [the number of receiving antennas*the number of transmitting antennas].

[0111] Transform H to obtain P=H·H H / σ 2 , where σ 2 is the estimated value of interference noise power.

[0112] Take an element P in P i，j , to perform feedback-related operations.

[0113] First, calculate P i，j The modulus and argument of , where the modulus A=|P i，j |, Argument θ=arg( P i，j ).

[0114] Secondly, the numerical compression operation is performed on A to determine which range the value of A belongs to. Assuming that A≥B, the compressed value A'=1.

[0115] Again, perform a numerical compression operation on θ

[0116] Again, take A' and θ' as the real part and imaginary part respectively, and modulate them onto the OFDM carrier, that is, construct the carrier transmission signal S=A'+θ'·j.

[0117] Again, select another element from the P matrix, r...

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Abstract

The invention discloses a method for realizing the channel information feedback and a device. The method comprises the following steps that: a matrix P to be fed back is built according to the channel information to be fed back, each element in the matrix P to be bed back is respectively modulated onto orthogonal frequency division multiplexing (OFDM) sub carrier waves and is fed back, and the modulation aiming at each element comprises the process of building an entity part and a virtual part corresponding to the carrier wave emission signals of the OFDM sub carrier waves according to the parameters of the elements. Aiming at the problems of quantization error existence and incomplete feedback information in the traditional quantization feedback mode, the scheme provides a set of complete concrete processing algorithm and flow process on the basis of the non-quantization feedback idea, the non-quantization feedback mode is adopted so that the feedback information of the feedback includes all channel information, the channel information can be effectively fed back in the existing multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system, and all characteristics of the channel information can be completely recovered by the receiving side.

Description

technical field [0001] The present invention relates to the field of communications, in particular, to realizing channel information feedback in a system using Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input and Multiple Output (MIMO) technologies methods and devices. Background technique [0002] OFDM technology is the transmission technology adopted by the new generation (4G) wireless cellular system Long Term Evolution (LTE) and Wimax. It has the advantages of high frequency efficiency, resistance to multipath propagation effects, and simple sending and receiving processing, thus becoming the mainstream of the new generation communication standard. transmission technology. [0003] MIMO technology refers to placing more than one antenna at both ends of the transceiver, and transmitting information through multiple transceiver channels. Regardless of theory or practice, MIMO technology has been proved to be able to greatly improve the spectral effici...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06H04L1/16
CPCH04L1/06H04L1/0026H04B7/0654H04B7/0626H04L1/0028H04L2025/03808H04L27/26H04L1/16
Inventor 宁迪浩朱登魁鲁照华郁光辉刘锟
Owner 射阳县射阳港对虾养殖二公司