Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression

A signal generation and vector signal technology, applied in electromagnetic wave transmission systems, transmission systems, electromagnetic transmitters, etc., can solve the problems of reduced system signal transmission performance, phase disorder, uneven constellation distribution, etc.

Inactive Publication Date: 2020-10-13
光创新电(苏州)信息科技有限公司
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Problems solved by technology

[0003] At the same time, although precoding can solve the problem of phase disorder or amplitude mismatch of received signals, the application of precoding technology makes the distribution of constellation diagrams in the system u

Method used

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  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression
  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression
  • Pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] combined with figure 1 , a vector millimeter-wave signal generation system based on optical carrier suppression without precoding,

[0026] Using external cavity laser 1 to generate laser to generate continuous wave;

[0027] Use MATLAB software programming to generate (3,1) vector signals in the digital domain, and use pseudo-random binary sequences to map to (3,1) vector signals

[0028] The number is sent to the waveform generator by two channels of I and Q;

[0029] The generated (3,1) signal is up-converted to an intermediate frequency signal, and mixed with two sinusoidal signals with a phase difference of 90 degrees to form a drive light intensity modulator

[0030] the required signal;

[0031] The interleaver 3 and the photodetector 4 are used to filter and convert the generated carrier signal to generate a quadruple frequency (3,1) vector...

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Abstract

The invention discloses a pre-coding-free vector millimeter wave signal generation system based on optical carrier suppression. An external cavity laser is used for generating laser to generate continuous waves; MATLAB software programming is used for generating (3, 1) vector signals in a digital domain, a pseudo-random two-level system sequence is used for mapping the (3, 1) vector signals, and the (3, 1) vector signals are sent to a waveform generator through an I path and a Q path; the generated (3, 1) signal is up-converted into an intermediate frequency signal, and the intermediate frequency signal is mixed with two sinusoidal signals with a phase difference of 90 degrees to form a signal required for driving the light intensity modulation modulator; and the generated carrier signal is filtered and converted by using an interleaver and a photoelectric detector to generate a quadruplicated frequency (3, 1) vector millimeter wave signal. Compared with the prior art, the system has the advantage that phase precoding is not needed.

Description

technical field [0001] The present invention relates to the technical field of optical fiber-wireless (Radio-over-Fiber, ROF) communication systems, in particular to a vector millimeter-wave signal generation system based on optical carrier suppression without precoding. Background technique [0002] With the continuous advancement of communication technology, users and enterprises have an increasing demand for high-speed, low-loss wireless communication equipment. Therefore, integrating the advantages of optical fiber transmission with low loss, high broadband, anti-electromagnetic Radio-of-Flight (ROF) communication systems are also increasingly used. Many studies have shown that external modulation is an effective modulation method to reduce fiber dispersion and extend transmission distance. Therefore, a stable RF carrier can be provided using an external modulator. In addition, the ROF system combined with Optical Carrier Suppression (OCS) can not only improve bandwidt...

Claims

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Application Information

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IPC IPC(8): H04B10/50H04B10/54H04B10/69
CPCH04B10/506H04B10/54H04B10/691
Inventor 余建军余思遥陈丽辉
Owner 光创新电(苏州)信息科技有限公司
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