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Control word and I/Q waveform synchronous transmission method and device oriented to efficient mobile forward transmission

A technology of waveform synchronization and transmission method, applied in electromagnetic wave transmission system, transmission system, optical fiber transmission and other directions, can solve the problem of difficult to meet the requirements of low complexity, low delay and low cost of mobile fronthaul, difficult hardware implementation, long signal delay and other problems, to achieve good backward compatibility, reduce computational complexity and signal delay, and build simple effects

Active Publication Date: 2021-07-20
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, this solution has problems such as large amount of calculation, long signal delay and hardware implementation difficulties, and it is difficult to meet the requirements of mobile fronthaul for low complexity, low delay and low cost

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  • Control word and I/Q waveform synchronous transmission method and device oriented to efficient mobile forward transmission
  • Control word and I/Q waveform synchronous transmission method and device oriented to efficient mobile forward transmission
  • Control word and I/Q waveform synchronous transmission method and device oriented to efficient mobile forward transmission

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The design idea of ​​the present invention is to provide a method for synchronous transmission of control words and I / Q waveforms for efficient mobile fronthaul. Wherein, the mobile fronthaul link such as figure 1 As shown, it includes separating the control word data and mobile signal I / Q waveform 110 in the mobile fronthaul at the sending end. In the mapping unit 120, the control word data is subjected to QAM constellation map mapping to generate control word QAM symbols, and then the control word QAM The symbol and the mobile signal I / Q waveform are sent to the channel aggregation unit 130 to realize channel aggregation, and input to the digital-to-analog conversion unit 140, and then the electro-optical conversion unit 150 conve...

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Abstract

The invention discloses a control word and I / Q waveform synchronous transmission method and device oriented to efficient mobile forward transmission, and the method comprises the steps: carrying out the quadrature amplitude modulation (QAM) constellation diagram mapping of control word data at a transmitting end, converting the control word data into a control word QAM symbol, carrying out the time domain up-sampling and digital orthogonal filtering of an I / Q component of the control word QAM symbol and a mobile signal I / Q waveform, and carrying out the time domain up-sampling and digital orthogonal filtering of the I / Q component of the control word QAM symbol; adding the filtered control word QAM symbol and the mobile signal I / Q waveform in a digital domain to realize channel aggregation; and at a receiving end, digitalizing the light current by an analog-to-digital converter and inputting into a plurality of parallel digital orthogonal filters to realize channel separation, and finally, recovering a control word QAM symbol and a mobile signal I / Q waveform through time domain down-sampling. According to the method, time domain up-sampling, digital orthogonal filtering and digital domain addition are used for replacing complex FFT / IFFT operation, the operation complexity, signal time delay and optical transceiver hardware development difficulty are remarkably reduced, good back compatibility is achieved for traditional mobile forward transmission, a communication system is easy to construct, and hardware is easy to achieve.

Description

technical field [0001] The invention relates to the field of optical fiber wireless fusion access technology, especially a control word and I / Q waveform synchronous transmission method and device for 5G and B5G mobile fronthaul with high spectral efficiency, low complexity, low delay and easy hardware implementation. Background technique [0002] In recent years, with the growth of mobile communication traffic and the increasingly dense deployment of mobile communication equipment, the problems of traditional distributed wireless access networks in terms of energy consumption and channel interference have become increasingly prominent, prompting the structure of wireless access networks to gradually shift to cloud wireless. Access network (Cloud-radio access network, C-RAN) architecture transformation. C-RAN is a green radio access network suitable for centralized processing (Centralized Processing), collaborative radio (Collaborative Radio) and real-time cloud computing arc...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/40H04B10/2575
CPCH04B10/5161H04B10/40H04B10/2575Y02D30/70
Inventor 邓明亮邢智博罗智睿施静伟王乐
Owner CHONGQING UNIV OF POSTS & TELECOMM
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