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Signal modulation method and execution device, channelization method and processing system

A signal modulation and signal technology, applied in the field of optical communication, can solve the problems of inability to correctly identify the signal amplitude and phase information, achieve the effect of low cost and complexity of improvement, reduce the difficulty of transformation, and avoid mutual interference

Active Publication Date: 2019-09-17
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

like figure 1 As shown, when the frequency of the RF signal exceeds half of the comb tooth interval, the upper sideband of the first comb tooth and the lower sideband of the second comb tooth overlap, and the amplitude and phase information of the signal cannot be correctly identified.

Method used

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  • Signal modulation method and execution device, channelization method and processing system
  • Signal modulation method and execution device, channelization method and processing system
  • Signal modulation method and execution device, channelization method and processing system

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A signal modulation method based on wavelength interleaved filtering, comprising the following steps:

[0055] The signal optical comb (optical frequency comb) is subjected to wavelength interleaving filtering to obtain odd-order comb teeth and even-order comb teeth respectively.

[0056] Based on the obtained odd-order comb teeth and even-order comb teeth, the signal to be processed is modulated to obtain an odd-number comb-teeth modulation signal and an even-number comb-teeth modulation signal. In one embodiment, both modulation frequencies operate at quadrature bias points.

[0057] The first filtering process is performed on the odd-numbered comb-tooth modulation signal, and the second filtering process is performed on the even-numbered comb-tooth modulation signal. At or after the highest frequency point of the even-numbered comb modulation signal; the modulation sidebands after the first filtering process and the second filtering process do not overlap. In this ...

Embodiment 2

[0063] Based on the above signal modulation method, this embodiment discloses a broadband channelization processing method based on wavelength interleaved filtering and coherent optical frequency comb, including the following steps:

[0064] The light source generates coherent signal light and local oscillator light, the signal light is sent to the signal optical comb generation module, and the local oscillator light is sent to the local oscillator light comb generation module; the signal light and the local oscillator light are preferably homologous;

[0065] The signal optical comb generation module modulates the received signal light and outputs the signal optical comb;

[0066] The local oscillator comb generation module modulates the received local oscillator light and outputs the local oscillator comb;

[0067] Executing the above-mentioned optical mixing method based on wavelength interleaved filtering to obtain a combined signal;

[0068] The combined signal and the l...

Embodiment 3

[0071] This embodiment discloses an overlapping signal processing device. The overlapping signal processing device includes two input terminals and one output terminal. The two input terminals respectively receive the signal optical comb and the signal to be processed. The overlapping signal processing device is used for Execute the program of the above-mentioned optical frequency mixing method, and output the operation result through the output terminal.

[0072] See attached figure 2 , In one embodiment, the above-mentioned overlapping signal processing device includes a wavelength interleaving filter, a first electro-optic modulator, a second electro-optic modulator, a first optical filter, a second optical filter and a combiner; the wavelength interleaving The input end of the filter receives the signal optical comb, and its two output ends are respectively connected to the optical input ends of the first electro-optic modulator and the second electro-optic modulator, and...

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Abstract

The invention discloses a signal modulation method, an execution device, a channelization method and a processing system. The process of the signal modulation method comprises the following steps: after carrying out interleaved filtering on signal optical combs, carrying out modulation and filtering on microwave signals based on two paths of optical signals respectively, and then carrying out combination processing. According to the channelization method, coherent signal light and local oscillation light are generated through a light source, a signal optical comb and a local oscillation optical comb are generated on the basis of the coherent signal light and the local oscillation light respectively, a combined signal is obtained through the signal modulation method, and after the combined signal and the local oscillation optical comb are combined, channelization processing based on coherent beat difference is carried out. The system comprises a coherent light generation module, a signal light comb generation module, a local oscillation light comb generation module, an overlapping signal processing device, a channel separation module and a coherent processing module. The upper limit of the working frequency of the microwave signal can be widened to two times of the original working frequency.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical mixing method based on wavelength interleaved filtering and coherent optical frequency comb, a storage medium, an overlapping signal processing device, a channelization method and a system. Background technique [0002] The use of microwave photonics technology for channelization processing has the advantages of wide processing bandwidth, high processing frequency, and strong parallel processing capability. There are two basic methods. One method is to load a broadband radio frequency signal onto the light, and use an optical comb with a narrow comb tooth interval and a narrowband optical filter with multiple filtering intervals arranged in succession to achieve channel separation. However, it is difficult to implement a narrowband filter bank with accurate center frequency and high square coefficient, as shown in Reference 1, and when the number of chann...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/61
CPCH04B10/5165H04B10/616H04B10/615
Inventor 刘静娴钟欣周涛陈智宇王茂汶
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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