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Odd frequency multiplication vector millimeter wave generation device and method without phase precoding

A generation device and odd multiple technology, applied in the field of communication, can solve problems such as poor performance, phase ambiguity, and imperfect photoelectric devices, and achieve the effects of simple implementation, high cost efficiency, and simple structure

Inactive Publication Date: 2018-09-11
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing even frequency multiplication technology is mainly based on the phase precoding method of phase compression to solve the phase ambiguity at the receiving end. Whether using balanced precoding or unbalanced precoding, the Euclidean distance between the constellation points after precoding is very small. The performance that affects the transmission in the optical fiber will also be limited, and it will be more susceptible to the imperfection of optoelectronic devices, and the performance will be poor
[0004] And the patent a kind of generation method and system of nine-fold frequency QPSK optical-carrying millimeter-wave signal (publication number CN105357159A) proposes a kind of generation method of nine-fold frequency QPSK light-carrying millimeter-wave signal, adopts this scheme to produce millimeter-wave signal and does not need to carry out phase adjustment Precoding, the receiving end does not require additional phase processing, but this scheme is only applicable to 1 / 9 / 17 octave

Method used

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  • Odd frequency multiplication vector millimeter wave generation device and method without phase precoding
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  • Odd frequency multiplication vector millimeter wave generation device and method without phase precoding

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Embodiment 1

[0035] Such as figure 1 As shown in the schematic diagram of the structural framework of the present invention, an odd frequency multiplication vector millimeter wave generation device without phase precoding of the present invention includes an off-line digital signal processing module at the transmitting end, a digital-to-analog converter module, an electric amplifier, a single-mode laser, and a phase Modulator, wavelength selective switch, single-ended photodiode, analog-to-digital converter module and off-line digital signal processing module at the receiving end.

[0036]The off-line digital signal processing module at the transmitting end is mainly used to generate an amplitude-precoded RF drive signal carrying transmission data based on off-line digital signal processing.

[0037] The main function of the digital-to-analog converter module is to perform digital-to-analog conversion on the amplitude-precoded RF drive signal carrying transmission data generated by the off...

Embodiment 2

[0049] The phase distribution of the QPSK signal is Or perform a corresponding rotation, and record the rotation angle as θ. When the receiving end receives the K-multiplied vector millimeter wave, the phase is also K-folded correspondingly, which is: These phases may overlap, resulting in indistinguishable phases at the receiving end, and correspondingly inability to recover information. Therefore, precoding is required at the transmitting end.

[0050] The present invention finds that the received phases do not necessarily overlap through analysis, and the specific analysis is as follows:

[0051] (1) When K is an even number, record K=2a, a=1, 2, 3,..., the phase received by the receiving end is:

[0052]

[0053] Since the period of the phase is 2π, that is to say, the first term coincides with the third term, and the second term coincides with the fourth term. When a is an even number, the four received constellations are completely coincident.

[0054] (2) When ...

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Abstract

The invention provides an odd frequency multiplication vector millimeter wave generation device and method without phase precoding, belonging to the technical field of electronic communication. The method comprises the steps that amplitude precoding is performed on an RF drive signal carrying sent data; then digital-to-analog conversion and power amplification are performed on the signal; a continuous wavelength optical carrier generated by a single-mode laser is injected into a phase modulator, and an amplified RF drive electric signal drives the phase modulator to output a series of sub-carriers; a wavelength selection switch selects two sub-carriers, the frequency interval of which is odd times of an RF drive frequency; and a single-ended photodiode performs heterodyne beat on the two selected sub-carriers, then analog-to-digital conversion is performed, and an offline digital signal processing module performs a corresponding odd multiple operation on the phase. The vector millimeter wave signal generation device and method omit the operation of phase precoding and have advantages that the structure is simple, implementation is easy, the cost is effective and the system performance is good.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a device and method for generating an odd frequency multiplier vector millimeter wave without phase precoding. Background technique [0002] With the improvement of bandwidth and rate requirements, radio frequency signals in low frequency bands cannot meet the requirements. The millimeter-wave frequency band (30-300GHz) can provide huge bandwidth and can be used in future wireless communication and space communication. However, due to the high frequency of the millimeter-wave signal, the loss is very large when it is transmitted in free space, which seriously affects its transmission. distance. Aiming at the problem of limited millimeter-wave transmission distance, optical-carrier wireless communication technology based on remote radio frequency came into being, that is, to modulate the millimeter-wave radio frequency signal onto the optical carrier and transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/548H04B10/64
CPCH04B10/5055H04B10/548H04B10/64
Inventor 赵伦余翔刘松廖明霞段思睿查锐
Owner CHONGQING UNIV OF POSTS & TELECOMM
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