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A frame detection method with anti-interference ability in line-of-sight communication

A frame detection and capability technology, applied in transmission systems, electrical components, etc., can solve problems such as failure to work properly, data frame loss, interference, etc., to achieve the effect of improving achievability, strong achievability, and reducing implementation complexity

Active Publication Date: 2022-02-11
XI AN JIAOTONG UNIV
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Problems solved by technology

[0002] In the communication system receiver, the receiving end needs to perform signal timing synchronization, that is, frame detection, which is the basis for the realization of the communication system receiver. Without accurate synchronization, the signal cannot be recovered reliably
In the actual communication system, sometimes there is interference, and the traditional frame detection scheme cannot work normally when the signal-to-interference ratio is lower than a certain value, resulting in the loss of data frames

Method used

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  • A frame detection method with anti-interference ability in line-of-sight communication
  • A frame detection method with anti-interference ability in line-of-sight communication
  • A frame detection method with anti-interference ability in line-of-sight communication

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] The present invention is a frame detection method with anti-interference capability in line-of-sight communication, the basic idea of ​​which is to perform first-level anti-interference processing on the received signal to improve the signal-to-interference ratio, and then perform frame detection on the anti-interference signal. The power inversion (PI) algorithm is used to perform anti-interference processing on the received signal. In this algorithm, one of the received signals is set as a reference signal, and the weight coefficient is always kept as 1. The airspace is combined, and the combined signal is the signal after anti-jamming. The criterion for selecting the weight of the PI algorithm is to minimize the output power while ensuring that the useful signal power is constant. The specific implementation steps of the PI algorithm are: one of the receiv...

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Abstract

The invention proposes a frame detection method suitable for line-of-sight communication with anti-interference capability. A frame detection method with anti-interference capability in line-of-sight communication, using a power inversion algorithm to set one of the received signals as a reference signal, keeping the weight coefficient at 1, adjusting the weights of the other received signals, and then according to the adjusted The weights of each received signal are merged in the spatial domain, and then the frame detection is performed on the merged signal. The method performs one-level anti-interference processing on the received signal before frame detection to improve the signal-to-interference ratio of the signal, and improves the frame detection performance of the communication system in an interference environment.

Description

technical field [0001] The invention belongs to the technical field of line-of-sight communication, and in particular relates to a frame detection method with anti-interference capability in line-of-sight communication. Background technique [0002] In a communication system receiver, the receiving end needs to perform timing synchronization of the signal, that is, frame detection, which is the basis for the realization of the communication system receiver. Without accurate synchronization, the signal cannot be recovered reliably. In the actual communication system, sometimes there is interference, and the traditional frame detection scheme cannot work normally when the signal-to-interference ratio is lower than a certain value, resulting in the loss of data frames. Contents of the invention [0003] In order to overcome the problems in the prior art, the object of the present invention is to provide a frame detection method with anti-interference ability in line-of-sight ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10
CPCH04B1/10H04B1/1027H04B2001/1063
Inventor 张渭乐何小初穆鹏程王文杰
Owner XI AN JIAOTONG UNIV
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