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Method and system for signal transmission in multi-I/O OFDM system

A technology of orthogonal frequency division and signal transmission, applied in the field of communication, which can solve the problems of complicated decoding and loss of spectral efficiency.

Inactive Publication Date: 2007-01-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0050] The technical problem to be solved by the present invention is to provide a new multiple-input multiple-output orthogonal frequency Signal transmission method and system in division multiplexing system

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  • Method and system for signal transmission in multi-I/O OFDM system
  • Method and system for signal transmission in multi-I/O OFDM system
  • Method and system for signal transmission in multi-I/O OFDM system

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Embodiment Construction

[0076] According to the theory of matrix transformation, Givens rotation can set any element of a vector to zero, and if the n×n matrix A is a symmetric matrix, applying Givens rotation to A can set the element a of matrix A ij and a ji becomes zero at the same time, i.e.:

[0077] G T ( i , j , θ ) AG ( i , j , θ ) = cos θ - sin θ sin θ cos θ a ii ...

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Abstract

The invention relates to a signal transmission method in multi-in multi-out orthogonal frequency division multiplexing (OFDM) system, comprising the steps of: (a) at transmitting end, converting series / parallel converted data to be sent, into Givens rotation-based orthogonal transmitted diversity code; (b) transmitting continuous data vector in the diversity code through two or above transmitting aerials in OFDM mode. And the invention also provides a corresponding system. Relative to quasi-orthogonal space-time block code, the invention eliminates self-interference items from related matrix and reduces decoding complexity; relative to the system adopting full diversity gain orthogonal frequency space-time block code, the invention obtains full rate transmission.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to a signal transmission method and system in a multiple-input multiple-output orthogonal frequency division multiplexing system. Background technique [0002] Orthogonal Frequency-Division Multiplexing (OFDM) and Multiple Input Multiple Output (Multiple Input Multiple Output) technologies are widely used for their effective anti-fading characteristics and high spectral efficiency respectively. . The MIMO-OFDM system formed by combining the two not only has the diversity gain and coding gain brought by space-time coding, but also has the advantages of simple structure of the OFDM receiver equalizer. They complement and complement each other technically, making them one of the most promising solutions for high-speed data transmission over wireless channels. [0003] Space-time coding (space-time coding) is a specific application in MIMO technology, which uses spac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 李君跃李云岗王吉滨
Owner HUAWEI TECH CO LTD
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