Low delay interpretation method and apparatus for DVBS2 signal
A low-latency and signal technology, applied in the field of communication reconnaissance, can solve the problems of large delay and difficult to meet the delay requirements of real-time confrontation tasks, and achieve the effects of reliable performance, shortened processing delay, and simple equipment.
Active Publication Date: 2016-04-06
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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The disadvantage of this method is that the delay is relatively large, which can meet the general non-cooperative reconnaissance tasks, but it is difficult to meet the delay requirements of real-time confrontation tasks, and this kind of environment also requires the system to support adaptive coding and modulation mode, with The ability to intercept all user messages while keeping hardware complexity, power consumption, and weight within a certain range
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[0027] refer to figure 1 The device of the present invention includes a channel unit 1, a sampling unit 2, a clock unit 3, a demodulation and decoding processing unit 4 and a system control monitoring unit 5, wherein the clock unit 3 inputs a sampling clock of 93.75 MHz to the sampling unit 2; The channel unit 1 converts the received DVBS2 radio frequency signal into an intermediate frequency signal; the sampling unit 2 performs analog / digital conversion, single-ended / differential conversion and data reorganization on the intermediate frequency signal, and sends the results to the demodulation and decoding processing unit 4 and the system respectively. Control and monitoring unit 5; demodulation and decoding processing unit 4 performs down-conversion, symbol synchronization operation, carrier synchronization operation, frame head correlation matching operation, and resolution to DVBS2 intermediate frequency signal according to the external input information and intermediate fre...
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The invention discloses a low delay interpretation method and apparatus for a DVBS2 signal, and relates to a method and an apparatus for performing reconnoitering and intercepting, synchronous head extracting, real-time demodulating and decoding on the DVBS2 signal in the field of communication reconnaissance. The apparatus is mainly composed of a channel unit, a sampling unit, a clock unit, a system control and monitoring unit, a demodulating and decoding processing unit, a VPX industrial control cabinet, an external display, an input device, etc. The method is a digital channeling and synchronous head detecting method based on a communication signal and is used for demodulating and decoding the DVBS2 signal. The apparatus has the advantages of short delay, lightweight, high signal-to-noise ratio tolerance, capability of supporting all DVBS2 modes, convenience for updating and the like, and is particularly suitable for space-based and ground-based satellite signal reconnaissance and interference occasions.
Description
technical field [0001] The invention relates to the detection and processing of DVBS2 signals in the field of communication reconnaissance. It has the ability to interpret DVBS2 signals with low time delay and low signal-to-noise ratio, can support all modes of DVBS2 signals and has the ability to expand DVBS2X systems upwards Ability. Background technique [0002] The existing DVBS2 reconnaissance system usually uses hardware demodulation plus software decoding as the processing method. The disadvantage of this method is that the delay is relatively large, which can meet the general non-cooperative reconnaissance tasks, but it is difficult to meet the delay requirements of real-time confrontation tasks, and this kind of environment also requires the system to support adaptive coding and modulation mode, with The ability to intercept all user messages while keeping hardware complexity, power consumption, and weight within a certain range. Therefore, exploring a lightweight...
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IPC IPC(8): H04L27/144H03D7/16H04B7/185H04N19/42
CPCH03D7/16H04B7/1851H04L27/144
Inventor 龚敏康
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP