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A Message Driven Frequency Hopping Communication Method Based on Binary Orthogonal Frequency Shift Keying Modulation

A message-driven, frequency-hopping communication technology, applied in modulated carrier systems, multi-frequency code systems, FM carrier systems, etc., to achieve the effect of improving spectral efficiency

Active Publication Date: 2022-06-21
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the receiving end compares energy errors, it will cause a large number of bit errors

Method used

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  • A Message Driven Frequency Hopping Communication Method Based on Binary Orthogonal Frequency Shift Keying Modulation
  • A Message Driven Frequency Hopping Communication Method Based on Binary Orthogonal Frequency Shift Keying Modulation
  • A Message Driven Frequency Hopping Communication Method Based on Binary Orthogonal Frequency Shift Keying Modulation

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Embodiment Construction

[0029] The present invention will be further clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be reminded that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] figure 1 It is the frame diagram of the frequency hopping (FI) communication system based on IFFT / FFT;

[0031] figure 2 It is the frame diagram of message-driven frequency hopping communication system based on binary orthogonal frequency shift keying modulation;

[0032] image 3 It is a schematic diagram of sub-channel division of a message-driven frequency hopping communication system based on binary orthogonal frequency shift keying modulation;

[0033] Figure 4 It is a schematic diagram of modulation and demodulation mapping of message-driven frequency hopping communication system based on binary orthogonal frequency shift keying modulation; ...

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Abstract

The invention belongs to the technical field of wireless communication, and in particular relates to a message-driven frequency hopping communication method based on binary orthogonal frequency shift keying modulation, which improves spectrum utilization and frequency hopping randomness, comprising the following steps: (1) Framing of digital information sources; (2) message-driven and 2QFSK modulation; (3) IFFT the modulated bits, adding cyclic prefix, and parallel-to-serial conversion; (4) information source information is sent after steps 1‑3 and passed through the channel Arrive at the receiving end; (5) serial-to-parallel conversion, remove the cyclic prefix, and perform FFT operation; (6) demodulate the driving bits according to the pair of sub-channels where the waveform is located. The frequency hopping based on 2QFSK modulation and IFFT / FFT combined with the message-driven frequency hopping technology provided by the present invention significantly improves the spectrum efficiency compared with the traditional frequency hopping technology. Compared with the message-driven frequency hopping technology, the present invention has simpler Demodulation method and certain noise immunity performance improvement.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a message-driven frequency hopping communication method based on binary orthogonal frequency shift keying modulation, which improves the frequency spectrum utilization rate and the randomness of frequency hopping. Background technique [0002] In order to apply the message-driven technology to the frequency hopping communication system based on the IFFT / FFT structure, a new mapping method is proposed based on the existing binary frequency shift keying (2FSK). Quadrature Frequency Shift Keying, QFSK). The so-called quadrature frequency shift keying is to divide the entire available frequency band into N sub-channels that overlap each other by 50%, and the first half of these sub-channels transmit the waveform representing "0", and the second half transmits the waveform representing "1". . Among all sub-channels, the i-th sub-channel and the (i+N / 2)-th ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/12H04L27/14H04L27/26H04B1/713
CPCH04L27/12H04L27/14H04L27/2607H04L27/2628H04L27/265H04B1/713
Inventor 宁晓燕宁宇孙志国孙溶辰
Owner HARBIN ENG UNIV