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

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...

AI Technical Summary

Problems solved by technology

Therefore, this solution has problems such as large amount of calculation, long signal delay and hardware implementati...

Images