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Interference suppression method and device

An interference suppression and sub-carrier technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problem that interference cannot be effectively suppressed, and achieve the goal of reducing out-of-band leakage, suppressing interference, and improving frequency band utilization. Effect

Active Publication Date: 2020-04-17
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, although the scheme suppresses the interference between subcarriers within a node, it cannot effectively suppress the interference between different nodes

Method used

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  • Interference suppression method and device

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] The embodiment of the present invention discloses an interference suppression method and device, which will be described in detail below.

[0050] It should be noted that each node in the ad hoc network may be assigned its corresponding subcarrier frequency band in advance, and the subcarrier frequency bands corresponding to each node do not overlap with each other.

[0051]For example, when there are M nodes in the ad hoc network, M>1, each node may be allo...

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Abstract

The embodiment of the invention discloses an interference suppression method and device. The interference suppression method is applied to a sending node in an ad hoc network, corresponding subcarrier frequency bands are allocated for nodes in the ad hoc network in advance, and the subcarrier frequency bands corresponding to the nodes are not overlapped with each other. The method comprises the following steps: modulating adjacent subcarriers in the subcarrier frequency band corresponding to the node according to a first weight factor and a second weight factor; and filtering the modulated subcarrier frequency band through a bandpass filter corresponding to the filter, and sending the modulated subcarrier frequency band, so that a receiving node modulates the received subcarrier frequency band. By adopting the interference suppression method disclosed by the embodiment of the invention, grouped filtering processing is carried out on the subcarriers to reduce the out-of-band leakage of the nodes, so as to suppress the interference between the nodes. Moreover, the adjacent subcarriers between the nodes are modulated according to the first weight factor and the second weight factor to effectively suppress the interference between the subcarriers.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to an interference suppression method and device. Background technique [0002] A wireless ad hoc network is a network composed of multiple nodes with wireless communication transceivers. It has the characteristics of multi-hop and temporary networking, and can quickly build a mobile communication network at any time and any place, without the support of existing basic networks (such as military communication, emergency communication and other special scene applications). All nodes in the wireless ad hoc network have equal status, without setting up any central control node, and have strong invulnerability. [0003] Nodes in the wireless ad hoc network mostly use Orthogonal Frequency Division Multiplexing (OFDM) technology to complete information transmission. However, since the OFDM technology uses a square wave as the baseband waveform, the subcarrier side...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2691
Inventor 余建国陈雷汪钬柱丁雅博王鹏培韩文哲
Owner BEIJING UNIV OF POSTS & TELECOMM
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