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Short-wave frequency hopping communication system based on general software radio platform

A general-purpose software and frequency-hopping communication technology, applied in the field of communication, can solve problems such as limited flexibility, poor versatility, and poor scalability

Inactive Publication Date: 2015-09-02
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional frequency hopping signal is mainly implemented based on the hardware system DDS or other dedicated hardware, and the corresponding frequency hopping signal modulation and demodulation algorithms are also implemented on related hardware, so its flexibility is limited and the scalability is poor. , the versatility is not strong

Method used

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  • Short-wave frequency hopping communication system based on general software radio platform
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  • Short-wave frequency hopping communication system based on general software radio platform

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Embodiment Construction

[0059] The present invention will be described step by step through the following specific embodiments in conjunction with the accompanying drawings.

[0060] The hardware platform of this embodiment adopts 2 PCs and 2 USRP N210s, one as a transmitter and the other as a receiver, using 0-30MHZ radio frequency transmitting and receiving sub-boards. The signal source part can be a gnuradio library module or a signal file from the outside world. The physical block diagram of the shortwave frequency hopping communication system is as follows: Figure 14 .

[0061] First of all, we need to connect the USRP N210 to the PC with a network cable, and then test the connectivity of the USRP N210. After the hardware test is connected, start the operation of the software platform.

[0062] Use the python language to import the algorithm for generating the frequency hopping sequence into the USRP sink and USRP source modules, and compile them respectively. Part of the code is shown in App...

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Abstract

A short-wave frequency hopping communication system based on a general software radio platform is disclosed. A signal emission module comprises a signal source module, a data packet conversion module, a digital signal modulation module and a USRP TX module, and the modules are successively connected. A signal receiving module comprises a USRP RX module, a digital signal demodulation module, a data packet demodulation module and a signal waveform module, and the modules are successively connected. On an emission module terminal, the signal source module emits a local signal; the data packet carries out data format conversion; GMSK modulation is performed; the USRP TX module carries out random emission at different time slots and different frequency points in a 3MHz-30MHz frequency range. On a receiving module terminal, a MIMO wire is used to connect a transmitter and a receiver; time synchronization is performed; an algorithm of emitting a same frequency hopping signal is used to carry out frequency hopping sequence synchronization; after the frequency hopping signals are received synchronously, the data format conversion is performed, the GMSK modulation is performed and a local signal is restored. By using the system of the invention, flexibility is high; equipment is simple; reconfiguration can be performed; a plurality of standards can be supported; rapid constructing can be performed and so on.

Description

technical field [0001] The invention belongs to the technical field of communication. In particular, it relates to a short-wave frequency-hopping communication system, which has strong flexibility, supports multiple standards, and is suitable for transmitting and receiving 0-30MHz short-wave signals. Background technique [0002] The traditional frequency hopping signal is mainly implemented based on the hardware system DDS or other dedicated hardware, and the corresponding frequency hopping signal modulation and demodulation algorithms are also implemented on related hardware, so its flexibility is limited and the scalability is poor. , the versatility is not strong. The Universal Software Radio Peripheral (USRP) is a general software radio hardware platform. Its main signal processing module FPGA can be reconfigured on the computer, and the processing of baseband signals can be completely transferred to the software platform. Support the transmission and reception of 0 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7183
Inventor 姚明魏葵
Owner NANCHANG UNIV
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