S-band segmented multi-ary chirp modulation wireless communication system and communication method thereof

Abstract

The present invention relates to a kind of S-band segmented multi-ary system chirp modulation wireless communication system, comprising a transmitter and a receiver, and the receiver receives a transmission signal from the transmitter; the transmitter includes an FPGA, a system clock, a high-speed DDS unit, a radio frequency Local oscillator unit, mixer, power amplifier, antenna; FPGA drives high-speed DDS unit to generate chirp coded signal, RF local oscillator unit generates local oscillator signal, chirp coded signal and local oscillator signal are mixed by mixer, and mixed Frequency processing moves the spectrum of the chirp coded signal to the 2-4GHz frequency band, and sends it to the power amplifier for amplification after frequency mixing processing, and the amplified signal is transmitted by the antenna; FPGA, according to the user-defined data requirements, performs coding and selects the transmission bandwidth and frequency band interval; user-defined data includes digital system, encoding bandwidth, encoding segmentation interval and transmitting frequency band; system clock provides clock frequency for high-speed DDS unit and FPGA.

Description

technical field [0001] The invention relates to an S-band segmented multi-ary chirp modulation wireless communication system and a communication method thereof, belonging to the technical field of communication. Background technique [0002] With the increasing demand for wireless communication with large capacity, high speed, high security and high reliability, people have to find new technologies in the overcrowded and very limited wireless spectrum. Chirp spread spectrum technology is the core technology of Chirp communication. In 1962, proposed by Winkler, Chirp spread spectrum technology began to be applied in the field of communication. But Winkler only proposed an idea at that time, but did not give a complete system implementation plan for this idea. Until 1966, Hata discovered that the Chirp spread spectrum signal has the characteristic of being immune to Doppler frequency offset, and proposed a system scheme using the Chirp spread spectrum signal for data transmi...

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Problems solved by technology

But Winkler only proposed an idea at that time, but did not give a complete system implementation plan for this idea

Until 1966, Hata discovered that the Chirp spread spectrum signal has the characteristic of being immune to Doppler frequency offset, and proposed a system scheme using the Chirp spread spectrum signal for data transmission. However, there was no better way to generate Chirp signals at that time, so The plan was not implemented

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