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Repeater and echo interference elimination method and device thereof

A technology of echo interference elimination and repeater, which is applied in the field of communication to achieve the effect of improving performance, eliminating echo interference, and avoiding the problem of signal non-convergence

Active Publication Date: 2021-01-05
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem solved by the present invention is how to eliminate the echo interference and improve the accuracy of echo interference elimination under the premise of reducing the structural complexity and cost of the repeater

Method used

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  • Repeater and echo interference elimination method and device thereof
  • Repeater and echo interference elimination method and device thereof
  • Repeater and echo interference elimination method and device thereof

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Embodiment Construction

[0034] In places such as large buildings and underground parking lots, there are often problems with poor mobile phone signals. Therefore, operators will add low-cost, low-power, and miniaturized relay stations in these hidden places. The relay station is usually composed of multiple repeaters. . On the one hand, the repeater receives the signal of the base station through the outdoor antenna, and after amplifying it, sends it to the mobile phone of the user through the indoor antenna, that is, amplifies the downlink signal; The antenna transmits to the base station. When the signal is amplified, since the received signal and the transmitted signal are in the same frequency band, there is a problem of co-frequency interference, so the isolation of indoor and outdoor antennas is required. After the echo interference cancellation processing, the same-frequency interference component in the relay station can be eliminated, and the isolation requirement between the two antennas c...

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Abstract

The invention provides a repeater and an echo interference eliminating method and apparatus thereof. The method comprises the following steps: detecting whether an echo channel gain of the repeater changes; when the echo channel gain of the repeater changes, adjusting the gain of an echo estimation link, and calculating the impact response of the echo channel of the repeater again; and updating a coefficient of a filter in the echo estimation link into the re-calculated impact response. By adoption of the scheme, the echo interference can be eliminated on the premise of reducing the structural complexity and the cost of the repeater, and improving the echo interference eliminating accuracy.

Description

technical field [0001] The invention relates to the communication field, in particular to a repeater and a method and device for eliminating echo interference thereof. Background technique [0002] In places such as large buildings and underground parking lots, there are often problems with poor mobile phone signals. Therefore, operators will add low-cost, low-power, and miniaturized relay stations in these hidden places. The relay station is usually composed of multiple repeaters. . On the one hand, the repeater receives the signal of the base station through the outdoor antenna, and after amplifying it, sends it to the mobile phone of the user through the indoor antenna, that is, amplifies the downlink signal; The antenna transmits to the base station. When amplifying the signal, since the received signal and the transmitted signal are in the same frequency band, there is a problem of co-frequency interference, so the isolation of indoor and outdoor antennas is required....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/015H04J11/00
CPCH04B7/015H04J11/0026
Inventor 李俊强刘鑫武杰周玉泽
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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