Inter-satellite self-homodyne coherent optical carrier radio frequency communication method and link
A radio frequency communication and self-homodyne technology, applied in the field of inter-satellite optical communication, can solve the problems of increasing the complexity of the system, limiting the practical application of coherent communication links, etc., achieving simple system structure, improving frequency utilization, and realizing low cost. Effect
Active Publication Date: 2020-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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The above reasons increase the complexity of the system and limit the practical application of coherent communication links
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[0033] Aiming at the deficiency of existing inter-satellite coherent laser communication technology, the solution of the present invention is to use two orthogonal polarization states to carry different sidebands respectively, and to amplify one of the polarization states at the receiving end to achieve coherent detection of the other polarization state. Realize self-homodyne coherent radio-frequency links over light without local lasers.
[0034] The inter-satellite self-homodyne coherent light-borne radio frequency communication method proposed by the present invention is as follows:
[0035] At the transmitting end, the polarization modulation of the radio frequency signal to be transmitted is performed on the optical carrier, and in the generated modulated optical signal, the odd-order sidebands and the even-order sidebands are respectively in two polarization states orthogonal to each other, and then the modulated light The signal is transmitted; at the receiving end, rec...
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The invention discloses an inter-satellite self-homodyne coherent optical carrier radio frequency communication method, which comprises the following steps that: at a transmitting end, a radio frequency signal to be transmitted is subjected to polarization modulation on an optical carrier, in the generated modulated optical signal, an odd-order sideband and an even-order sideband are respectivelypositioned on two polarization states which are mutually orthogonal, and then the modulated optical signal is transmitted out; at a receiving end, the modulated optical signal is received, optical signals in two orthogonal polarization states are separated through polarization, the polarization state of one path of the separated optical signal is adjusted to be the same as that of the other path of the separated optical signal, and then the two paths of optical signals are equally divided into two paths after being coupled; and finally, balance detection is carried out on the equally divided two paths of optical signals to recover the radio frequency signal to be transmitted. The invention also discloses an inter-satellite self-homodyne coherent optical carrier radio frequency communication link. Compared with the prior art, the self-homodyne coherent detection can be realized without optical carrier extraction by a narrow-band optical filter, and the link has the advantages of higherspectral efficiency, simpler structure and lower implementation cost.
Description
technical field [0001] The invention belongs to the technical field of inter-satellite optical communication, and in particular relates to an inter-satellite self-homodyne coherent light-borne radio frequency communication method. Background technique [0002] The inter-satellite network is an important part of the space-space-ground integrated network, and plays an important role in multi-satellite joint collaboration, so the establishment of inter-satellite communication links is crucial. With the further exploration of deep space, the number of satellites increases, and the electromagnetic environment becomes more and more complex, traditional radio frequency communication can no longer meet the current requirements of long-distance, high-speed, and large-bandwidth. Compared with traditional radio frequency communication, laser communication has unique advantages such as high carrier frequency, large transmission bandwidth, no electromagnetic interference, small beam dive...
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IPC IPC(8): H04B10/63H04B10/61
CPCH04B10/614H04B10/6151H04B10/616H04B10/63
Inventor 徐忠扬孙修远潘时龙王辉孔令振
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS