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A sending device and signal transmission method

A sending device and signal technology, applied in the field of communication, can solve problems such as poor interference suppression effect

Active Publication Date: 2021-01-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The uplink signal needs to pass through the digital front end (DFE), analog front end (AFE), line driver (line driver, LD) module and hybrid (hybrid, H) circuit in the user terminal and finally transmit to the dual Twisted wires. In the prior art, the interference of the uplink signal transmission of the user terminal to the downlink frequency band is usually reduced by increasing the rejection ratio of the H circuit. However, the suppression effect of the H circuit is greatly affected by the dispersion of the device and the change of the cable impedance. Ineffective suppression

Method used

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  • A sending device and signal transmission method

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Embodiment Construction

[0082] Embodiments of the present application provide a sending device and a signal transmission method, which are used to reduce the interference of uplink signal transmission on a downlink frequency band.

[0083] The embodiment of the present application is implemented on the basis of xDSL technology. xDSL includes ADSL, VSDL and V35, etc., and xDSL adopts frequency division multiplexing to divide uplink and downlink frequency bands, such as figure 1 As shown, the frequency band division method of V35 is as follows. There are three uplink frequency bands US0, US1 and US2, and three downlink frequency bands DS1, DS2 and DS3. The uplink frequency band refers to the signal frequency band sent from the user terminal equipment to the central office equipment; the downlink frequency band It refers to the signal frequency band of the user terminal equipment sent from the central office equipment. The uplink and downlink signals transmit data at the same time, and the frequency band...

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Abstract

The embodiment of the present application discloses a sending device and a signal transmission method, which are used to reduce the interference of uplink signal transmission on a downlink frequency band. The sending device in the embodiment of the present application includes: an analog front-end AFE and a line driver LD module, the output end of the AFE is connected to the input end of the LD module, the AFE includes at least one low-pass filter LPF, each of the LPF A filtering frequency point is set, the AFE is used to obtain the first signal, and the signal higher than the filtering frequency point in the first signal is filtered out by the LPF to obtain a second signal, and the LD module is used for The second signal is received. In addition, a signal transmission method is provided, which can reduce the interference of the uplink signal transmission on the downlink frequency band.

Description

technical field [0001] The present application relates to the communication field, and in particular to a sending device and a signal transmission method. Background technique [0002] Various types of digital subscriber line (x digital subscriber line, xDSL) are technologies for data transmission on a pair of twisted pairs, including asymmetric digital subscriber line (asymmetric digital subscriber line, ADSL), ultra-high-speed digital subscriber line (very high speed digital subscriber line, VDSL) and V35, etc. [0003] xDSL uses frequency division multiplexing to divide the uplink and downlink frequency bands. For example, the V35 frequency band is divided as follows. There are three uplink frequency bands US0, US1 and US2, and three downlink frequency bands DS1, DS2 and DS3. Among them, US0 corresponds to 25k-138kHz , DS1 corresponds to 138k-3.75MHz, US1 corresponds to 3.75M-5.2MHz, DS2 corresponds to 5.2M-8.5MHz, US2 corresponds to 8.5M-12MHz, DS3 corresponds to 12M-35...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525H04M11/06
CPCH04B1/525H04M11/062H04L12/10
Inventor 赵治磊李东
Owner HUAWEI TECH CO LTD
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