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Blocking matrix interference elimination method in WO-FTN transmission system

A block matrix, interference cancellation technology, applied in the field of wireless optical communication, can solve the problems of increasing system complexity and cost, and achieve the effect of reducing matrix operation complexity and high bit error performance

Active Publication Date: 2020-07-17
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods will increase the complexity and cost of the system

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  • Blocking matrix interference elimination method in WO-FTN transmission system
  • Blocking matrix interference elimination method in WO-FTN transmission system
  • Blocking matrix interference elimination method in WO-FTN transmission system

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Embodiment Construction

[0018] The invention provides a block matrix interference elimination method in a wireless optical super-Nyquist (WO-FTN) rate transmission system, through which the FTN communication system can obtain higher bit error performance and have lower calculation the complexity. The present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

[0019] The present invention achieves through following technical measures:

[0020] 1. Basic assumptions:

[0021] The present invention adopts 4PAM modulation, assumes that the channel is a Gamma-Gamma channel, and the channel state is known. Assuming that the background light has been filtered out by the filter, only additive white Gaussian noise is considered. This assumption is typical for such systems and not a specific requirement of the present invention.

[0022] 2. Specific implementation steps:

[0023] After gray encoding and 4PAM mapping, the original user infor...

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Abstract

The invention discloses a blocking matrix interference elimination method in a WO-FTN transmission system. The method comprises the following steps: blocking a data signal at a sending end; generatingFTN signals from the data in each sub-block through an FTN forming filter, calculating an FTN transmission characteristic coefficient matrix according to the coefficient of the forming filter, and multiplying the inverse of the matrix by the received data sub-blocks, thereby reducing the interference caused by FTN transmission and improving the error code performance of the system. Meanwhile, inthe execution process of the method, due to the fact that the forming filters are consistent and the FTN transmission characteristic coefficient matrixes are identical in inverse, the matrix inversionoperation only needs to be conducted once in the whole information transmission process, and therefore the overall calculation complexity of the system can be reduced.

Description

technical field [0001] The invention relates to a blocking matrix interference elimination technology suitable for wireless optical super-Nyquist (WO-FTN) rate transmission. The method divides 4PAM signals into multiple sub-blocks and then performs super-Nyquist transmission. The invention adopts matrix operation in the computer to reduce the intersymbol interference (ISI) of the system, and belongs to the technical field of wireless optical communication. Background technique [0002] With the rapid development of the mobile communication industry, the demand for large-capacity and high-speed transmission in communication networks continues to grow. Wireless optical communication has the advantages of unlimited spectrum and flexible links, so it can be used as an alternative measure to solve high bandwidth requirements. However, the link state of the wireless optical communication system is easily affected by weather, particles, and turbulence, resulting in a decrease in t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/2507H04B10/508H04B10/516H04B10/524H04B10/69
CPCH04B10/2507H04B10/508H04B10/524H04B10/516H04B10/697
Inventor 曹明华张伟王惠琴康中将吕佳芸张家玮吴照恒李文文夏皆平
Owner LANZHOU UNIVERSITY OF TECHNOLOGY