Information transmission method of double-layer topology architecture of multi-channel radiometer imaging system
An imaging system and information transmission technology, applied in the field of radiometer imaging, can solve the problems of low real-time performance and high energy consumption
Active Publication Date: 2021-07-06
SHANGHAI JIAOTONG UNIV
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[0005] Aiming at the problems that the number of imaging channels of the current space-borne radiometer does not exceed 100, the real-time performance is low, and the energy consumption is high, the present invention proposes an information transmission method of a double-layer topology structure of a multi-channel radiometer imaging system, which can The number of channels supporting radiometer imaging reaches 500 to 1500 channels, while meeting the low complexity, real-time and low power consumption required by the multi-channel radiometer system, while having scalability, and designing the internal structure corresponding to the topology To meet the real-time processing requirements of the radiometer imaging system
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[0042] Such as figure 1 As shown, this embodiment takes the topology of H_4_5 as an example, 20 distributed modules are connected through a two-layer topology, and the number of sampling channels integrated by each distributed module is 32, so a total of 640 sampling channels can be performed under this topology. radiometer imaging of each acquisition channel.
[0043] The bottom fully interconnected layer in the above-mentioned two-layer topology architecture uses 4 distributed modules as a group for fully interconnected connections, and the distributed modules at the same position in the fully interconnected layer are formed by a top-level ring connection The top-level ring structure, the topology of the H_4_5 only needs a total of 50 links, which greatly reduces the complexity of the system.
[0044] Such as figure 2 As shown, {DU under the topology of H_4_5 t,0 The fully interconnected layer of |t∈[0,3]} is taken as an example, given DU 0,0 The small circle transfer r...
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An information transmission method of a double-layer topology of a multi-channel radiometer imaging system, which is implemented by distributed modules in the form of full interconnection at the bottom layer and ring connection at the top layer, wherein: each distributed module is based on the digital data of several channels collected Signal information performs signal preprocessing, data transmission and sending, and complex correlation calculation processing and outputs complex correlation calculation result information. A core distributed module in the double-layer topology architecture collects the relevant calculation results of all other distributed modules and outputs them to subsequent modules. Perform image inversion, while the core distributed module receives external control signals and forwards them to other distributed modules. The invention satisfies the low complexity, real-time performance and low power consumption required by the multi-channel radiometer system while having scalability, and designs an internal structure corresponding to the topology to meet the real-time processing requirements of the radiometer imaging system.
Description
technical field [0001] The invention relates to a technology in the field of radiometer imaging, in particular to an information transmission method for a double-layer topology structure of a multi-channel radiometer imaging system for spaceborne equipment. Background technique [0002] The interferometric passive microwave imaging technology obtains the visibility function by sampling the spatial frequency domain of the target, and then performs inverse imaging algorithms such as Fourier transform to obtain the final target brightness temperature image. The sampling of the target's spatial frequency domain is accomplished by binary interferometers with different baseline lengths. A binary interferometer essentially performs a complex correlation of the signals received by the two antennas. Binary interferometers with different baseline lengths can sample different points of the visibility function. The more types of baseline lengths, the more sampling of the visibility fun...
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IPC IPC(8): H04L12/42H04L12/46H04L12/803H04L12/709H04L45/243
CPCH04L12/42H04L12/4637H04L47/125H04L45/24H04L2012/421
Inventor 宫新保张正王彧宋罡
Owner SHANGHAI JIAOTONG UNIV