Single input single output repeater for relaying a multiple input multiple output signal

An input signal and repeater technology, applied in the field of signal transmission, can solve the problems of interfering with the system, degrading, destroying the MIMO encoding of the signal, etc.

Inactive Publication Date: 2012-02-22
ANDREW WIRELESS SYST GMBH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, a problem in implementing a SISO system with MIMO signals is that SISO repeaters may reduce the benefits of such MIMO signals
More specifically, there is a concern that such SISO devices or systems have the potential to corrupt the MIMO encoding of the signal and thereby create interference and degrade the system

Method used

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  • Single input single output repeater for relaying a multiple input multiple output signal
  • Single input single output repeater for relaying a multiple input multiple output signal
  • Single input single output repeater for relaying a multiple input multiple output signal

Examples

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Embodiment Construction

[0021] figure 1 Shown is a processing diagram for an example MIMO transmission of wireless signals, in this example using Orthogonal Frequency Division Multiplexing (OFDM). Data from a data source 101 is converted by quadrature amplitude modulation (QAM) 102 into a carrier signal. The modulated signal is then subjected to space-time block code (STBC) encoding 103 to split it into multiple (shown as two) orthogonal signals, wherein , each quadrature signal undergoes an inverse discrete Fourier transform 104a, 104b. For the sake of simplicity, other components related to OFDM transmission, such as pilot tone and cyclic prefix insertion, are not included in the figure, but those skilled in the art can understand this. The system components above reference line 108 may be the base station side of the MIMO system. The transmission environment 106 for MIMO signals may subject these signals to various radio channel propagation phenomena, such as vacuum propagation, reflection, tra...

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Abstract

A multiple input multiple output (MIMO) signal is retransmitted using a single input single output (SISO) repeater, which includes Rayleigh channel simulators associated with each separate MIMO channel. Before being combined and transmitted over a single channel, the transmission undergoes simulated Rayleigh fading. The signal is then retransmitted to be received by a MIMO-equipped receiver.

Description

technical field [0001] The present invention relates to signal transmission, and more particularly to multiple-input multiple-output (MIMO) signal transmission. Background technique [0002] In recent years, the demand for high network capacity and performance in wireless services has grown. One approach for improving spectral efficiency is to implement a multiple-input multiple-output (MIMO) system that uses antenna arrays to spatially multiplex signals. MIMO systems use multiple transmit and multiple receive antennas, while all communications on the same frequency occur in an orthogonal and uncorrelated fashion. In environments where line of sight is reduced or eliminated and different signal portions have different path lengths, MIMO signals can transmit signals with fewer errors. [0003] In order to effectively extend the coverage area of ​​wireless signals, repeaters or repeater-like systems are used. However, a conventional repeater or repeater-like system is a sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B17/00
CPCH04B7/0413H04B7/0669H04B7/155H04B17/3911
Inventor O·布拉兹S·艾森温特M·施马利舍J·斯特凡尼克
Owner ANDREW WIRELESS SYST GMBH
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