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Uplink noise suppression method for LTE distributed relay system

A distributed relay and noise suppression technology, applied in the transmission system, radio transmission system, electrical components, etc., can solve the problems of base station noise raising LTE distributed relay system, etc., to improve the uplink receiving sensitivity, remove interference, Avoid the effect of the background noise being raised

Active Publication Date: 2017-06-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Purpose of the invention: The purpose of the present invention is to provide a method for suppressing uplink noise in an LTE distributed relay system that can solve the problem of rising base station noise in the prior art

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  • Uplink noise suppression method for LTE distributed relay system
  • Uplink noise suppression method for LTE distributed relay system
  • Uplink noise suppression method for LTE distributed relay system

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Embodiment Construction

[0027] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0028] like figure 1 As shown, the LTE distributed relay system usually consists of one near-end unit and multiple distributed remote units. The near-end unit is facing the base station, and the donor antenna of the near-end unit is generally installed in a position where the signal of the donor base station is better, which enables the repeater to receive a relatively stable signal source, so as to better play the performance of the repeater. The remote unit is oriented to the user end, and its hardware circuit and functions are basically similar to those of the near-end unit, and the two are connected through optical fibers or cables. There can be a flexible networking mode between the remote units and the near-end units to meet the requirements of the communication system.

[0029] figure 2 The functional block diagram of the LTE distribute...

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Abstract

The invention discloses an uplink noise suppression method for an LTE distributed relay system. The method comprises the following steps: after converting signals received by the LTE distributed relay system to digital baseband signals, firstly processing the digital baseband signals by using an analysis filter bank to obtain digital signals at each resource block frequency band; then respectively enabling the digital signals at each resource block frequency band to pass a power calculation unit and a discrimination unit to calculate the energy of the digital signals at each resource block frequency band, and comparing the energy of the digital signals at each resource block frequency band with the noise threshold; if the energy spectrum of the digital signals is smaller than the noise threshold, enabling the signal output of the resource frequency band to be zero, and if the energy spectrum of the digital signals is greater than the noise threshold, implementing undistorted output of the digital signals at the resource block frequency band; and then processing the output signals at each resource block frequency band by using a synthesis filter bank to obtain reconstructed LTE digital baseband signals. By adopting the uplink noise suppression method disclosed by the invention, the defect that the bottom noise of the base station is raised can be effectively avoided.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an uplink noise suppression method in an LTE distributed relay system. Background technique [0002] Mobile communication technology refers to the communication between mobile devices or between mobile devices and fixed devices. At present, usually in a certain area, multiple base stations form a cellular network with each other. By controlling the communication between base stations and mobile devices The mutual sending and receiving of signals between them realizes the transmission of mobile communication signals. With the rapid development and innovation of mobile communication technology, there are also some problems to be solved. Due to the transmission characteristics of wireless signals and the limitations of various terrains, the signal continues to weaken during signal transmission, causing the signal to fail to reach some specific areas. These specific areas are c...

Claims

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Application Information

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IPC IPC(8): H04B7/155H04B1/10
CPCH04B1/1027H04B7/155
Inventor 张华强勇
Owner SOUTHEAST UNIV
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