Time division long term evolution (TD-LTE) transmitting system and transmitting method based on digital pilot frequency search

A forwarding system, digital technology, applied in the direction of transmission system, radio transmission system, electrical components, etc., can solve the problems of signal distortion, inaccurate mobile communication, single application, etc., to reduce the impact of noise interference, improve signal coverage quality, Simple way to achieve the effect

Active Publication Date: 2013-04-10
ALLWIN TELECOMM
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Problems solved by technology

However, in the digital wireless repeater, when the time-division switch is switched incorrectly, the signal may be seriously distorted, and mobile communication cannot be carried out accurately
The current technology is mainly to determine the switching time of the time-division switch by detecting the level value of the input signal, so as to switch, but this method is limited by the quality of the received signal, the implementation method is complicated, and the application is relatively simple

Method used

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  • Time division long term evolution (TD-LTE) transmitting system and transmitting method based on digital pilot frequency search
  • Time division long term evolution (TD-LTE) transmitting system and transmitting method based on digital pilot frequency search
  • Time division long term evolution (TD-LTE) transmitting system and transmitting method based on digital pilot frequency search

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Embodiment Construction

[0032] For the convenience of the following description, the following noun explanations are first given:

[0033] TD-LTE (Time Division Long Term Evolution): Time Division Long Term Evolution, the fourth generation ( 4G) mobile communication technology and standards;

[0034] LTE (Long Term Evolution): Long-term evolution, a transition between 3G and 4G technologies, is the global standard of 3.9G;

[0035] FPGA (Field Programmable Gate Array): field programmable gate array;

[0036] ICS (Interference Cancellation System): interference cancellation system;

[0037] PSS (Primary Synchronization Signal): primary synchronization signal;

[0038] SSS (Secondary Synchronization Signal): secondary synchronization signal;

[0039] OFDM (Orthogonal Frequency Division Multiplexing): Orthogonal Frequency Division Multiplexing technology;

[0040] ID (IDentity): identification code, also known as serial number or account number;

[0041] FDD (Frequency Division Duplexing): frequen...

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Abstract

The invention discloses a time division long term evolution (TD-LTE) transmitting system and a transmitting method based on digital pilot frequency search. The TD-LTE transmitting system comprises an analog-digital converter, a field programmable gate array (FPGA) chip, a digital-analog converter and a power amplifier. The FPGA chip comprises a digital signal processing unit and a TD-LTE transmitting control unit which is used for carrying out frequency offset correction and time division switch switching control. An output end of the analog-digital converter is connected with the digital signal processing unit, the digital-analog converter and the power amplifier in sequence. An output end of the digital signal processing unit is connected with an input end of the TD-LTE transmitting control unit, and an output end of the TD-LTE transmitting control unit is respectively connected with an input end of the digital signal processing unit, an input end of the analog-digital converter and an input end of the digital-analog converter. The TD-LTE transmitting system and the transmitting method based on digital pilot frequency search correctly switch upstream signals and downstream signals, enable the upstream signals and the downstream signals to enter corresponding links to process, and reduce influence of noise interruption, are simple in achieving method, accurate in switching, capable of improving signal coverage quality, and capable of being widely used in communication industries.

Description

technical field [0001] The present invention relates to a signal forwarding system and method, in particular to a TD-LTE forwarding system and method based on digital pilot search. Background technique [0002] Digital wireless repeater is an indispensable part of mobile communication, which realizes signal amplification and ensures the stability of signal during transmission. However, in the digital wireless repeater, when the time-division switch is switched incorrectly, the signal may be severely distorted, and mobile communication cannot be carried out accurately. The current technology is mainly to determine the switching time of the time-division switch by detecting the level value of the input signal, so as to switch, but this method is limited by the quality of the received signal, the implementation method is complicated, and the application is relatively simple. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/155H04B1/44
Inventor 郝禄国杨建坡余嘉池曾文彬
Owner ALLWIN TELECOMM
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