TD-SCDMA system base station radio-frequency digital long-drawn optical fiber transmitting method and apparatus

A TD-SCDMA, optical fiber transmission technology, applied in the direction of optical fiber transmission, transmission system, optical fiber radio, etc., can solve the problems that the quality of the clock signal cannot meet the requirements of mobile communication, large digital bandwidth and high cost, and is convenient for flexible mobile communication network engineering design. , reduce complexity, and increase the effect of long-distance transmission

Active Publication Date: 2006-08-02
成都芯通软件有限公司
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Problems solved by technology

However, the quality of the clock signal obtained in this way cannot meet the requirements of mobile communication.
Moreover, the disadvantage of using the SDH digital intermediate frequency transmission method is that the digital bandwidth generated af...

Method used

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  • TD-SCDMA system base station radio-frequency digital long-drawn optical fiber transmitting method and apparatus
  • TD-SCDMA system base station radio-frequency digital long-drawn optical fiber transmitting method and apparatus
  • TD-SCDMA system base station radio-frequency digital long-drawn optical fiber transmitting method and apparatus

Examples

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Embodiment Construction

[0032] figure 2 with image 3 What is shown is a structural form of a radio frequency transceiver used to realize the optical fiber transmission method of the radio frequency digital telemetry of the TD-SCDMA system base station of the present invention.

[0033] The basic structure of this RF transceiver 300 includes a digital receiving unit 302 with a time-division multiplexing circuit and a specific wavelength optical transmitter, a digital transmitting unit 303 with a time-division demultiplexing circuit and an optical receiver, and a band-pass filter 345 A time-division duplexer unit 301, a clock recovery and distribution circuit unit 348, and a microprocessor unit (MCU) that monitors and monitors the radio frequency transceiver are formed with a circulator 346 and are connected to the receiving unit and the transmitting unit, respectively. 355.

[0034] The digital receiving unit 302 is composed of an analog receiver 310 and its local oscillator circuit 331 , an analo...

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Abstract

This invention is fiber-optical transmission method for drawing far away the TD-SCDMA system base station radio-frequency digit. The radio-frequency signal receiver-transmitter in wireless base station and base band digital signal processing part in wireless base station are separated and drawn far away to antenna neighborhood. After digitizing the intermediate-frequency port of radio-frequency signal receiver-transmitter, the received and transmitted digital data stream signal, controlling or detecting digital signal and referenced clock signal are respectively modulated to corresponding light wavelength. After making the optical signals corresponded to each radio-frequency receiver-transmitter confluent, an optical fiber is used to up-transmitting and down-transmitting respectively. At the receiving end, the confluent signal is split in terms of wavelength. The split signals are demodulated to corresponding digital signals respectively. This invention also provides the radio-frequency signal receiver-transmitter and indoor base station interface card matching this transmission method.

Description

technical field [0001] The present invention relates to a transmission method and a corresponding device used after the base station radio frequency is digitally remoted in the third-generation mobile communication TD-SCDMA system, specifically a method using optical fiber transmission and a corresponding device. Background technique [0002] Chinese patent application number 200510001653.2 provides a technology of "IF transmission method and IF interface for base station equipment to realize remote radio frequency". Wireless transmission means connect the remote radio frequency analog transceiver unit to the wireless base station. Among them, multiple remote radio frequency analog transceiver units can use a pair of transmission media to realize various connection methods including star, chain and ring. In this method, the base station modulates the analog intermediate frequency signal between each radio frequency transceiver at an intermediate frequency carrier frequency,...

Claims

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Application Information

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IPC IPC(8): H04B10/12H04B10/17H04B10/2575
Inventor 李睿
Owner 成都芯通软件有限公司
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