S waveband segment-based multi-ary chirp modulated wireless communication system and communication method thereof

Abstract

The invention relates to an S waveband segment-based multi-ary chirp modulated wireless communication system. The system comprises a transmitter and a receiver; the receiver receives transmitting signals from the transmitter; the transmitter comprises an FPGA, a system clock, a high speed DDS unit, a radio frequency local oscillation unit, a mixer, a power amplifier and an antenna; the FPGA drives the high speed DDS unit to generate chirp coding signals; the radio frequency local oscillation unit generates local oscillation signals; the chirp coding signals and the local oscillation signals are mixed by the mixer; the frequency spectrums of the chirp coding signals are shifted to a 2-4 GHz frequency band through mixing; the mixed signals are sent to the power amplifier for amplification; the amplified signals are transmitted by the antenna; the FPGA codes according to customized data demanded ary and selects a transmitting bandwidth and a frequency band interval; the customized data comprise a digital ary, a coding bandwidth, a coding segment interval and a transmitting frequency band; and the system clock provides clock frequencies to the high speed DDS unit and the 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...

AI Technical Summary

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

Images