Multi-band arbitrary phase coded signal generation device and method
A technology of encoding signals and arbitrary phases, applied in the field of microwave photonics, can solve problems such as signal power attenuation, crosstalk, and radar signal power fluctuations
Pending Publication Date: 2021-06-04
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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[0003] At present, the existing multi-band phase encoding signal generation method can only perform binary phase encoding, and at the same time, due to the existence of additional baseband modulation signals, it will cause crosstalk with other communication frequency bands
In addition, in the radar network, the radar waveform generated in the central station needs to be transmitted to different base stations through optical fiber before transmission. During the optical fiber transmission, the dispersion of the optical fiber may cause signal power attenuation, resulting in radar signals at different carrier frequencies and periodic power fluctuations over the transmission distance
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[0024]Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present disclosure.
[0025] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, s...
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The invention relates to a multi-band arbitrary phase coded signal generation device, which comprises: a light source, which is used for outputting an optical carrier wave; a first photoelectric modulation module, which is used for loading a microwave signal to the optical carrier wave, and generating a multi-order single-side-band optical signal by adjusting a plurality of direct-current bias voltages loaded on the first photoelectric modulation module; a second photoelectric modulation module, which is used for loading a coded signal to the optical carrier wave and generating a coded modulation optical signal by adjusting a plurality of direct-current bias voltages loaded on the second photoelectric modulation module; an erbium-doped optical fiber amplifier, which is used for amplifying the signal; a polarization controller and a polarizer, which are used for adjusting polarization states of the coded modulation optical signal and a multi-order single side band optical signal to obtain a synthetic optical signal; and a photoelectric detector, which is used for performing photoelectric conversion on the synthesized optical signal to obtain a multi-band arbitrary phase coded microwave signal. According to the device provided by the invention, the multi-band arbitrary phase coded microwave signal without background noise can be obtained, and one-to-multipoint long-distance anti-dispersion optical fiber transmission can be realized.
Description
technical field [0001] The present disclosure relates to the technical field of microwave photonics, and in particular to a multi-band arbitrary phase encoding signal generation device and method. Background technique [0002] Multi-band phase-encoded signals can improve the resolution and sensitivity of target identification, mapping and tracking, and reduce the risk of false detection in adverse conditions. In recent years, multi-band radar has attracted attention due to its excellent immunity to electromagnetic interference. [0003] At present, the existing multi-band phase encoding signal generation method can only perform binary phase encoding, and at the same time, due to the existence of additional baseband modulation signals, it will cause crosstalk with other communication frequency bands. In addition, in the radar network, the radar waveform generated in the central station needs to be transmitted to different base stations through optical fiber before transmissi...
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IPC IPC(8): G01S7/02G01S7/00G02F2/00G02B27/28H04B10/2513
CPCG01S7/02G01S7/003G02F2/004G02B27/286G02B27/283H04B10/2513
Inventor 朱厦曹旭华李伟王欣李明祝宁华
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI