Reconfigurable broadband high-frequency frequency hopping signal generation method

A frequency hopping signal and broadband technology, applied in the field of reconfigurable broadband high-frequency frequency hopping signal generation system, can solve the problems of frequency hopping series, frequency hopping speed limitation, performance limitation, insufficient stability, etc., and achieve center frequency increase, The effect of doubling the bandwidth

Active Publication Date: 2022-03-04
XIAN INSTITUE OF SPACE RADIO TECH
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  • Description
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AI Technical Summary

Problems solved by technology

In practical applications, it is necessary to generate multi-stage frequency hopping signals to meet various application requirements. The method of constructing a tunable filter by using thermally tuned silicon-based microring resonators can generate multi-stage frequency hopping signals with ten stages. The method mainly uses the microring resonator to filter the optical comb, and then beats the seed optical carrier with the photodetector to generate a multi-level frequency hopping signal. The signal is easily affected by the environment, not stable enough, and limited by the performance of integrated devices, the frequency hopping series and frequency hopping speed are limited to a certain extent

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  • Reconfigurable broadband high-frequency frequency hopping signal generation method
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specific Embodiment approach 1

[0032] The first embodiment is a reconfigurable broadband high-frequency frequency hopping signal generation method based on a dual-channel tunable optical carrier, such as figure 1 shown. It is mainly composed of a dual tunable optical carrier unit (DTOCU), an electrical signal generation unit EGU and a frequency hopping signal generation unit FHG. Among them, DTOCU generates dual-channel optical signals on demand; FHG is composed of electric phase shifter PS, 2×2 optical coupler OC1, optical combiner OC2, direct current source DC, parallel intensity modulators IM1 and IM2, and is used to generate multi-level jump frequency signal. Through the electric phase shifter with a phase shift of 90 degrees, the phases of the electrical signals loaded on IM1 and IM2 are quadrature, and through the 2×2 optical coupler OC1, the dual optical signals output by the DTOCU unit are simultaneously loaded on IM1 and IM2 , make IM1 and IM2 work at the minimum point through DC control, ensure ...

specific Embodiment approach 2

[0034] The second specific embodiment is the generation of high-frequency broadband multi-stage frequency hopping signals. The specific steps are:

[0035] Step 1: According to figure 1 , the DTOCU unit is composed of two light sources LD1 and LD2, the EGU unit is an electrical frequency hopping signal unit, and the output angular frequency of LD1 is ω 1 , the amplitude is E 0 One continuous optical carrier signal of , the output angular frequency of LD2 is ω 2 , the amplitude is E 0 Another continuous optical carrier signal of the EGU unit outputs an electrical frequency hopping signal.

[0036] Step 2: According to figure 1 , the continuous optical carrier signal output by LD1 in DTOCU is sent to an optical input port of OC1 in FHG unit, the continuous optical carrier signal output by LD2 in DTOCU is sent to another optical input port of OC1 in FHG unit, and the electrical frequency hopping signal output by EGU The signal is divided into two channels, one is sent to th...

specific Embodiment approach 3

[0058] The third embodiment is the generation of broadband multi-stage frequency hopping signals with wide spectrum coverage, such as figure 1 shown. The specific steps are:

[0059] Step 1: The DTOCU unit is composed of two-way 2FSK optical signals OFSK1 and OFSK2 that change with the binary code sequence. OFSK1 and OFSK2 are respectively controlled by the relevant binary sequence codes. The two code sequences can be completely the same or different. The signal output by the EGU unit is a microwave radio frequency signal, which may be a single frequency signal or a radio frequency signal with a certain bandwidth.

[0060] Step 2: According to figure 1, the 2FSK optical signal output by OFSK1 in the DTOCU is sent to an optical input port of OC1 in the FHG unit, the 2FSK optical signal output by OFSK2 in the DTOCU is sent to another optical input port of OC1 in the FHG unit, and the microwave radio frequency signal output by the EGU is divided into Two channels, one is sent ...

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Abstract

The invention relates to a reconfigurable broadband high-frequency frequency hopping signal generation system and method, and belongs to the technical field of microwave photons. The invention provides a reconfigurable broadband high-frequency frequency hopping signal generation method based on a double-path tunable optical carrier. The method comprises the following steps: generating double-path continuous optical signals with a certain frequency interval or double-path 2FSK optical signals modulated by binary sequence codes as required through the double-path tunable optical carrier; an optical domain frequency hopping signal is generated by combining an optical coupler with a parallel intensity modulator, and a reconfigurable broadband high-frequency frequency hopping signal is obtained through a photoelectric detector.

Description

technical field [0001] The invention relates to a system and method for generating a reconfigurable broadband high-frequency frequency hopping signal based on a dual-channel tunable optical carrier, and belongs to the field of microwave photon technology. Background technique [0002] Frequency hopping (FH) microwave signal, as one of the most commonly used spread spectrum methods, can be widely used in communication, radar and electronic countermeasure systems. In the communication system, the frequency hopping signal has anti-attenuation and anti-interference characteristics, and can improve the system transmission capacity; in the radar system, the large time bandwidth product of the frequency hopping signal can improve the detection accuracy of the radar; in the electronic countermeasure system, the signal Frequency hopping can make it anti-detection for secure communication. Improving information security in data transmission, providing anti-jamming requirements in mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7136H04B10/54H04B10/80
CPCH04B1/7136H04B10/541H04B10/801Y02D30/70
Inventor 蒋炜李立李小军谭庆贵秦伟泽王迪龚静文
Owner XIAN INSTITUE OF SPACE RADIO TECH
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