Broadband frequency hopping digital signal generation system

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...

AI Technical Summary

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

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