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Method and system for realizing high-security fast frequency-hopping transmission

A frequency hopping and fast technology, applied in transmission systems, multi-frequency code systems, electrical components, etc., can solve problems such as weak anti-interception ability, and achieve the effects of high throughput, increased difficulty, and low bit error rate.

Inactive Publication Date: 2014-07-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to propose a relatively mature IDFT technology in digital signal processing to realize Method and system for fast frequency hopping transmission with high security

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  • Method and system for realizing high-security fast frequency-hopping transmission
  • Method and system for realizing high-security fast frequency-hopping transmission
  • Method and system for realizing high-security fast frequency-hopping transmission

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Embodiment Construction

[0070] Specific embodiments of the present invention are described below. In an effort to provide a concise description of these implementations, not all features of an actual implementation are described in this document. It should be recognized that during the development of any actual implementation, some other application-specific decisions may have to be made in order to comply with specific system and business-related constraints. These specific decisions, which could be complex and time consuming, are routine tasks of design, fabrication, and production to those of ordinary skill having the benefit of this disclosure.

[0071] The purpose of frequency hopping communication is to realize the confidentiality and anti-interference of information transmission. The present invention absorbs the common IFFT technology from OFDM technology and DMT technology, so that the carrier signal generator is not needed when performing frequency hopping communication modulation, thereby...

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Abstract

The invention discloses a method and system for realizing high confidentiality and fast frequency hopping transmission. When sending data, the sending end performs the bits, modulation mode and subcarrier cluster calculation on the data to be sent according to the carrier frequency hopping information specified in the current time slot. After power allocation, all subcarrier data are mapped to the time domain using the IFFT transformation method, and then sent to the receiving end through digital-to-analog conversion. The processing process at the receiving end is the reverse process of the transmitting end. The system of the invention includes a carrier frequency hopping information generating device, a subcarrier data dynamic allocation / dynamic demodulation device, an IFFT / FFT module, a digital-to-analog / analog-to-digital converter and a sending / receiving module. Benefiting from the frequency hopping system of the present invention, it can produce a frequency hopping rate that is much higher than that of a conventional single-carrier frequency hopping communication system, has high frequency hopping signal concealment, strong interception resistance, and high communication system availability. At the same time, the present invention utilizes multiple subcarriers for simultaneous transmission, thereby improving wireless spectrum utilization.

Description

technical field [0001] The invention belongs to a method for realizing frequency-hopping transmission, in particular to a method and a system for realizing high-secrecy and fast frequency-hopping transmission based on multi-carrier technology. Background technique [0002] Frequency hopping transmission refers to a wireless information transmission method in which "the carrier frequency used to carry data information can continuously hop according to a certain frequency hopping pattern". Since the selection range of the carrier frequency is much larger than the bandwidth of the baseband signal, and the carrier stays at a specific frequency point for a short time, it is difficult to detect an instantaneous carrier signal. At the same time, by transmitting related data on different carrier frequencies, frequency diversity can be used to combat interference. The spread spectrum communication system based on frequency hopping technology can effectively resist all kinds of man-m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B1/713
Inventor 陈相宁徐超永郝丽芳
Owner NANJING UNIV
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