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Adaptive frequency hopping system based on FPGA and adaptive frequency hopping method

An adaptive and frequency hopping technology, applied in the field of communication, can solve the problems of the system's ability to transmit information decline and cannot be avoided, and achieve the effect of improving the anti-interference ability and solving the decline of the ability.

Inactive Publication Date: 2019-04-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the current frequency hopping communication system cannot avoid the disturbed frequency hopping point, which leads to the decline of the system's ability to transmit information

Method used

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  • Adaptive frequency hopping system based on FPGA and adaptive frequency hopping method
  • Adaptive frequency hopping system based on FPGA and adaptive frequency hopping method
  • Adaptive frequency hopping system based on FPGA and adaptive frequency hopping method

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specific Embodiment approach 1

[0042] Specific implementation mode one: combine figure 1 , figure 2 and image 3 This embodiment will be described. An FPGA-based adaptive frequency hopping system described in this embodiment, the adaptive frequency hopping system includes a transmitter part and a receiver part:

[0043] The transmitter part includes a source module, an information encoding module, a DBPSK modulation module, a frequency mixing module, a DAC, a transmitter adaptive frequency hopping pattern generator module, a transmitter control module, a clock source module and a pseudocode generator module ;

[0044] The source module is used to generate data information and send the data information to the information encoding module;

[0045] The information encoding module is used to encode the received data information, and send the encoded data information to the DBPSK modulation module;

[0046] The DBPSK modulation module is used to modulate the frequency hopping carrier of the received coded ...

specific Embodiment approach 2

[0062] Specific embodiment two: a kind of method based on FPGA self-adaptive frequency hopping described in this embodiment, this method realizes by following steps:

[0063] The source module generates data information, and sends the generated data information to the information encoding module; the information encoding module encodes the data information, and sends the encoded data information to the DBPSK modulation module; the DBPSK modulation module encodes the encoded data information The frequency hopping carrier is modulated, and the modulated data information is transmitted to the frequency mixing module;

[0064] The clock source controls the pseudo-code generator to generate a pseudo-random code, and sends the generated pseudo-random code to the transmitter adaptive frequency hopping pattern generator module, and the transmitter adaptive frequency hopping pattern generator module generates different frequencies according to the pseudo-random code information, and se...

specific Embodiment approach 3

[0071] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the frequency hopping synchronization module of the receiver adopts the method of fast outbound capture and early-late gate energy.

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Abstract

An adaptive frequency hopping system based on FPGA and an adaptive frequency hopping method are used for a communication technology field. A current frequency hopping communication system can not avoid an interfered hopping point so that a system information transmission capability is decreased. In the invention, the above problem is solved. A receiver portion can evaluate the quality of a channel, and then the frequency hopping point of the adaptive frequency hopping system is changed to avoid the poor frequency point in an actual channel transmission process. The problem that information transmission capability is decreased is effectively solved so as to increase the anti-interference capability of the frequency hopping system. The system and the method can be applied to the communication technology field.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an adaptive frequency hopping system and an adaptive frequency hopping method. Background technique [0002] Spread spectrum communication theory is closely related to Shannon's theorem: [0003] [0004] Among them, C is the channel capacity, B is the channel bandwidth, and S / N represents the signal-to-noise ratio of the system. Equation (1) gives the mathematical relationship between these three, describing the ability of information transmission without error. Formula (1) can be transformed into [0005] [0006] Generally speaking, there is interference in the spread spectrum communication system, so that then there is [0007] [0008] Available [0009] [0010] The relationship among channel bandwidth, channel capacity and system signal-to-noise ratio can be analyzed by formula (4). It can be seen that under the condition that the chann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/715H04B1/7156H04B1/7136H04L27/12H04L27/144
CPCH04B1/7136H04B1/715H04B1/7156H04B2001/7154H04L27/12H04L27/144
Inventor 赵洪林倪坤臣张佳岩蒲一鸣
Owner HARBIN INST OF TECH