Signal transmission method and device

A signal transmission and main signal technology, applied in the field of communication, can solve the problems of signal transmission quality degradation, frequency deviation of microwave signals and intermediate frequency signals, etc.

Active Publication Date: 2014-06-04
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The embodiment of the present invention provides a signal transmission method and device to solve the problem in the prior art that the signal transmission quality is degraded due to the frequency deviation between the converted microwave signal and the intermediate frequency signal when the signal is transmitted through the remote microwave system.

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  • Signal transmission method and device
  • Signal transmission method and device

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Embodiment Construction

[0039] whether for figure 1 The shown M&DU1 is still M&DU2. When converting the IF signal into a microwave signal and converting the microwave signal into an IF signal, the converted frequency band actually has a certain frequency deviation compared with the frequency band to be converted. And just figure 1 As far as the remote microwave system shown is concerned, the frequency offset generated when converting multiple signals is fixed. For example, the frequency offset generated when M&DU1 converts one microwave signal into an intermediate frequency signal is the same as the M&DU1 that converts another microwave signal. The frequency offset generated when the signal is converted into an IF signal is the same.

[0040]In the embodiment of the present invention, in order to eliminate the frequency offset and improve the signal transmission quality, the MAU and the MRU pre-agreed on an IF pilot signal with a set pilot frequency F2, and determined the conversion of the IF pilot ...

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Abstract

The invention discloses a signal transmission method and a signal transmission device. The signal transmission method and the signal transmission device are used for solving the problem of reduction in signal transmission quality during the signal transmission of a microwave remote system in the prior art. The method comprises the following steps of: receiving an intermediate frequency signal comprising an intermediate frequency main signal and an intermediate frequency pilot signal, mixing the received intermediate frequency main signal and the received intermediate frequency pilot signal to obtain a mixed intermediate frequency signal, converting the mixed intermediate frequency signal into a radio frequency signal, and transmitting the radio frequency signal. The frequency offset of the received intermediate frequency pilot signal relative to set pilot carrier frequency is the same as that of the intermediate frequency main signal, so that the frequency offset of the two signals can be eliminated by mixing the intermediate frequency pilot signal and the intermediate frequency main signal, which have the same frequency offset, and the mixed intermediate frequency signal does not have any frequency offset component; and the intermediate frequency signal without the frequency offset is converted into the radio frequency signal for transmission, so that the signal transmission quality is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a signal transmission method and device. Background technique [0002] In the mobile communication system, the repeater is usually used as a relay to amplify and forward the downlink signal of the base station and the uplink signal of the mobile terminal, and realize the extension of the function of the base station at a lower cost than the base station, so that the mobile The coverage of communication signals is further improved. At present, the system that extends the function of the base station through repeaters mainly includes: remote microwave system, remote optical fiber system, remote network cable system, and remote coaxial cable system. [0003] The microwave remote system uses microwave as the transmission medium through the microwave remote repeater. Compared with other remote systems, it has better communication reliability and wiring networking effic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40
Inventor 樊奇彦陈中高黄振海
Owner COMBA TELECOM SYST CHINA LTD
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