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VDE-based processing system of multi-path channel detection

A channel detection and processing system technology, applied in transmission systems, digital transmission systems, modulated carrier systems, etc. problems such as low noise ratio, to achieve the effect of improving comprehensive processing capacity, reducing the number of back-end demodulators, and reducing processing delay

Active Publication Date: 2019-03-29
SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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Problems solved by technology

For space-borne receivers, due to the long transmission distance and large link loss of the sea-air target signal, the signal-to-noise ratio of the sea-air target signal received by the satellite is low, which requires high performance and complexity of the demodulation algorithm, resulting in the demodulation High resource usage

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  • VDE-based processing system of multi-path channel detection
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Embodiment Construction

[0024] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] figure 1 It is a schematic framework diagram of a processing system based on VDE multi-channel channel detection according to an embodiment of the present invention; figure 2 It is a composition block diagram of an O&M symbol timing estimator according to an embodiment of the present invention; image 3 It is a block diagram of M-power phase detection according to an embodiment of the present invention; Figure 4 It is a waveform result diagram of a high-speed frequency-related FPGA online test according to an embodiment of the present invention.

[0026] Such as figure 1 As shown, the present invention provides a processing system based on VDE multi-channel channel detection, including: burst energy detection module, f...

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Abstract

The invention provides a VDE-based processing system of multi-path channel detection. The system includes a burst energy detection module, a frame head combined-way storage module, a high-speed frequency correlation compensation module, an open-loop timing and phase detection module, a bi-orthogonal decoding and decision module, a valid-channel selection module, a demodulator group module and a combined-way group package output module. Through the multi-path VDE channel detection processing system based on a VDE communication protocol mechanism of the invention, the number of receiving demodulators is greatly reduced, and hardware pressure of a receiving system is alleviated. The processing system has very important significance and very broad application prospects for multi-path receivingof VDE sea-air target signals.

Description

technical field [0001] The invention relates to a VDE-based multi-channel channel detection processing system. Background technique [0002] With the development of maritime communication technology, in order to solve the bottleneck of serious time slot conflict and low communication rate in the existing ship AIS communication system in some areas, the International Organization of Aids to Navigation (IALA) proposed the ship's VDE communication system, and in the VDE system The communication links between satellites and ships have been added to meet the different needs of offshore and far-sea ships, laying the foundation for complex and multi-functional maritime communication applications in the future. [0003] Based on the satellite ships in the VDE system, the ship communication in the area can be coordinated by means of time division, frequency division and code division multiple access to avoid message collisions in the cell. For space-borne receivers, due to the long ...

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Application Information

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IPC IPC(8): H04B7/185H04L27/00H04L27/22
CPCH04B7/18513H04L27/0014H04L27/22H04L2027/0026H04L2027/0046H04B7/18515H04B7/18517
Inventor 向前李惠媛罗小成姚崇斌叶曦周少骞
Owner SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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