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Noise suppression method, device and LTE digital microwave radio frequency remote coverage system

A noise suppression, digital microwave technology, applied in the field of communication, can solve the problem of raising the noise floor of the base station, and achieve the effect of increasing flexibility, improving uplink coverage and uplink throughput, and avoiding the noise floor being raised.

Active Publication Date: 2016-05-04
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a noise suppression method, device, and LTE digital microwave radio remote coverage system to solve the problem of elevated base station noise in the LTE digital microwave radio remote coverage system in the prior art

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  • Noise suppression method, device and LTE digital microwave radio frequency remote coverage system
  • Noise suppression method, device and LTE digital microwave radio frequency remote coverage system
  • Noise suppression method, device and LTE digital microwave radio frequency remote coverage system

Examples

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Embodiment 1

[0029] Such as figure 1 As shown, it is a main flowchart of a noise suppression method provided by Embodiment 1 of the present invention, which is applied to the remote microwave transmission system of the LTE digital microwave radio remote coverage system. The method includes the following steps:

[0030] Step 11, by performing analog-to-digital A / D conversion on the analog intermediate frequency signal sent by the analog down-converter, to obtain a plurality of digital sub-band signals;

[0031] Specifically, in this step 11, the uplink LTE radio frequency signal transmitted by the user terminal is received from the space through the coverage or receiving antenna, and the uplink radio frequency signal is obtained after filtering out unnecessary signals. Amplify, and after analog down-conversion processing by the analog down-converter, down-convert the uplink intermediate frequency signal to an analog intermediate frequency signal, and then perform A / D conversion sampling on ...

Embodiment 2

[0044] Correspondingly, Embodiment 2 of the present invention provides a noise suppression device. Embodiment 2 of the present invention is a device under the same concept as Embodiment 1 of the present invention, and is applied to the remote microwave of the LTE digital microwave radio remote coverage system. In the transmission system, such as figure 2 Shown is a schematic structural diagram of the noise suppression device, including:

[0045] The analog-to-digital conversion unit 21 is configured to obtain a plurality of digital sub-band signals by performing analog-to-digital A / D conversion on the analog intermediate frequency signal sent by the analog down-converter;

[0046] The down-conversion unit 22 is used to obtain a plurality of sub-band baseband signals by performing digital down-conversion processing on the digital sub-band signals obtained by the analog-to-digital conversion unit 21 respectively;

[0047] The comparison unit 23 is used to compare the carrier-t...

Embodiment 3

[0056] Such as image 3 As shown, it is a schematic diagram of the internal structure of an uplink baseband processor provided by Embodiment 3 of the present invention, which includes: an analog-to-digital A / D converter 31, a digital down-converter DDC32, and a carrier-to-noise ratio Ec / Io decision circuit 33 and digital upconverter DUC34, where,

[0057] The A / D converter 31 is connected with the digital down-converter DDC32, performs analog-to-digital A / D conversion on the analog intermediate frequency signal sent by the analog down-converter, and sends the obtained multiple digital sub-band signals to the digital down-converter DDC32 ;

[0058] Digital down-converter DDC32 is connected with Ec / Io decision circuit 33, after carrying out digital down-conversion processing to each digital sub-band signal respectively, a plurality of sub-band baseband signals obtained are used as the input signal of Ec / Io decision circuit 33;

[0059] The Ec / Io decision circuit 33 is connecte...

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Abstract

The invention discloses a noise suppression method and device, as well as an LTE (long term evolution) digital microwave remote radio coverage system, and aims at solving the problem that the bottom noise of a base station of the LTE digital microwave remote radio coverage system in the prior art is lifted. The method comprises the following steps of: performing analog / digital (A / D) conversion on analog intermediate frequency signals sent from an analog down converter by an uplink baseband processor of a remote-end microwave transmission system applied to the LTE digital microwave remote radio coverage system to obtain a plurality of digital sub-band signals; respectively performing digital down-conversion treatment on all the digital sub-band signals to obtain a plurality of sub-band baseband signals; respectively comparing the carrier-to-noise ratio of each sub-band baseband signal with a preset carrier-to-noise ratio threshold; performing digital up-conversion treatment on the sub-band baseband signals with the carrier-to-noise ratio more than the carrier-to-noise ratio threshold to obtain corresponding digital radio frequency signals and send to an optical transceiver; and shutting off the sending time slots of the sub-band baseband signals with the carrier-to-noise ratio not more than the carrier-to-noise ratio threshold.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a noise suppression method and device and an LTE digital microwave radio frequency remote coverage system. Background technique [0002] The mobile communication system is mainly composed of three parts: mobile station, wireless access network and core network. Wherein, the radio access network includes a radio network controller and a base station. Among them, the main function of the base station is to receive and send mobile communication signals. Generally, in a certain area, multiple base stations form a cellular network with each other, and the transmission of mobile communication signals is achieved by controlling the mutual transmission and reception of signals between base stations. The area within this range is what we often say network coverage. The area that the base station cannot cover is the blind area of ​​the mobile communication signal. In an actual m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04B7/15
Inventor 肖田忠柳洋冯量
Owner COMBA TELECOM SYST CHINA LTD
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