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broadcast data transmission system

A technology for broadcasting data and data, applied in digital transmission systems, transmission systems, radio transmission systems, etc., can solve the problems of high correlation and performance degradation of transmitting and receiving antennas, and achieve the goal of improving data transmission performance and preventing broadcast data transmission performance degradation. Effect

Inactive Publication Date: 2016-03-16
ELECTRONICS & TELECOMM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, broadcasting systems are different from existing mobile communication systems in that there is a high possibility of correlation between transmitting and receiving antennas
[0005] Therefore, in the case of the above-mentioned channel environment, the existing spatial multiplexing method will have a large performance degradation

Method used

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Examples

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Embodiment Construction

[0021] figure 1 is a diagram showing a broadcast data transmission system according to an illustrated embodiment.

[0022] A system is provided which receives an input vector 110x=[x 1 , x 2 ] T . Each element of the input vector x is part of the data stream transmitted by the broadcast data transmission device.

[0023] The precoder 120 precodes the received input vector 110 by using a precoding matrix Θ. According to one aspect, the precoder 120 multiplies the precoding matrix Θ by the input vector x, so as to generate a precoded data stream. The signal vector r containing the precoded data stream through elements can be defined by the following equation 1:

[0024] [mathematical formula 1]

[0025] r = [r 1 , r 2 ] T =Θx

[0026] According to one aspect, the precoding matrix may include a plurality of column vectors. In this case, multiple column vectors may be mutually orthogonal. According to one aspect, each column vector of the precoding matrix Θ may be a c...

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Abstract

A broadcast data transmission system is provided. The broadcast data transmission system utilizes multiple transmission antennas and multiple receiving antennas to transmit broadcast data. The broadcast data transmission device included in the broadcast data transmission system can determine different modulation modes for each transmission antenna, determine different transmission power for each data stream according to the determined modulation mode, and determine different precoding vectors.

Description

technical field [0001] The following embodiments relate to a system for transmitting broadcast data, and more specifically, relate to a system for improving reception performance by connecting a spatial multiplexing system and a precoder in series in a mobile broadcast channel environment. Background technique [0002] In a wireless communication environment, a multiple-input multiple-output MIMO system has recently been attracting attention because it utilizes multiple transmit and receive antennas to obtain a high data transmission rate. In particular, the spatial multiplexing method called Bell Labs' vertical layered space-time has the advantage of improving spectral efficiency because independent signal streams are simultaneously transmitted through each transmitting antenna. [0003] However, some problems occur when applying this spatial multiplexing method to a mobile broadcasting system. First, a sharp drop in performance can occur in the erasure fading channel envi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04
CPCH04B7/0443H04B7/0682H04L27/0008H04L27/367H04W52/262H04B7/0434H04B7/0456H04B7/0617H04B7/0857H04L1/0054
Inventor 裴在辉李光淳李贤李奉镐金永受宋润政李寿寅郑泰榛金俊浩金镐俊许南淏林炯秀徐在贤金兴默
Owner ELECTRONICS & TELECOMM RES INST
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