Broadband frequency hopping digital signal generation system

A digital signal, broadband frequency hopping technology, applied in transmission systems, electrical components, etc., can solve the problems of small output frequency range, narrow frequency hopping bandwidth, limited and other problems, and achieve the effect of solving the small output frequency range

Inactive Publication Date: 2016-03-30
10TH RES INST OF CETC
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  • Abstract
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Problems solved by technology

However, DDS technology is limited by the system working clock, and the output frequency range is small, resulting in a narrow frequency hopping bandwidth

Method used

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  • Broadband frequency hopping digital signal generation system
  • Broadband frequency hopping digital signal generation system
  • Broadband frequency hopping digital signal generation system

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Embodiment Construction

[0015] The invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] refer to figure 1 . In the embodiment described below, the digital generation system of broadband frequency hopping signal includes: phase control word generation module 1, phase accumulation value calculation module 2, phase accumulator 3, phase offset value calculation module 4, phase offset module 5. Lookup table module 6, frequency hopping information generation module 7, modulation module 8, rate conversion module 9 and digital / analog converter DAC module 10, wherein: the phase control word generation module 1 divides the obtained phase control word into two One way is sent to the phase accumulation value calculation module 2, and the phase accumulation value is calculated, and the phase accumulation value is phase-accumulated by the phase accumulator 3 to obtain the first DDS phase value; the other way is sent to the phase offset value calculation...

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Abstract

The invention provides a broadband frequency hopping digital signal generation system. The system can expand the range of conventional DDS output frequency and generates the large frequency hopping bandwidth frequency hopping signals. A phase control word generation module divides the obtained phase control word into two paths, one path of the phase control word is sent to a phase accumulation value calculation module, a phase accumulated value is resolved and is subjected to phase accumulation by a phase accumulator, and then a first DDS phase value is obtained; the other path of the phase control word calculates the phase deviation values of other DDSs via a phase deviation value calculation module, the phase values of other DDSs are obtained via a phase deviation module based on the first DDS phase value and the phase deviation values obtained by the second path, the first DDS phase value and the phase values of other DDSs are input into a look-up table module to look into the look-up table to get the amplitude values of the DDSs, the amplitude values of the DDSs and the frequency hopping information generated by a frequency hopping information generation module are input into a modulation module to be subjected to multi-phase modulation, and a rate conversion module performs the rate conversion on the modulation data.

Description

technical field [0001] The invention is applicable to the field of wireless communication, and is a system for generating broadband frequency hopping signals in a frequency hopping communication system. technical background [0002] Wireless communication is a kind of communication system that is easily disturbed, so effective anti-jamming technology must be studied to deal with serious jamming threats. Frequency hopping communication system has been widely used because of its strong anti-interference ability. The anti-jamming ability of the frequency hopping communication system mainly comes from the rapid hopping of the frequency hopping frequency point in a large frequency range. Therefore, the frequency hopping bandwidth of the frequency hopping signal, the frequency hopping switching time and other indicators determine the anti-interference performance of the frequency hopping communication system. Traditional frequency-hopping signal generation methods mainly include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7136
CPCH04B1/7136H04B2201/713
Inventor 张毅蒋友邦
Owner 10TH RES INST OF CETC
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