Microstrip resonant coherent demodulator for ampsk modulated signals

Abstract

The invention discloses a micro-strip resonance coherent demodulator for AMPSK modulating signals. After the demodulator directly extracts a coherent carrier from analog signals received through an antenna, the coherent carrier and the received AMPSK modulating signals are superposed, wherein the coherent carrier and a received signal carrier are the same in frequency and strictly opposite in phase. Therefore, an AMPSK modulating signal carrier is restrained, an AMPSK phase modulation time interval is expanded, the signals are demodulated, no analog-digital conversion or down-conversion needs to be carried out on the received signals, and the demodulator can complete coherent carrier extraction and AMPSK modulating signal coherent demodulation only through a micro-strip open-circuit line. According to the micro-strip resonance coherent demodulator for the AMPSK modulating signals, on the premise that the advantages of being high in the spectrum utilization rate of the AMPSK modulating signals and high in information transmission rate are kept, the problems that a traditional demodulation method based on a digital shock filter is limited by analog-digital conversion and the processing rate, and the microwave frequency band modulation signals are hard to demodulate are solved.

Description

Technical field [0001] The invention relates to a microstrip resonant coherent demodulator for AMPSK modulated signals, which is a demodulator that uses a microstrip resonator to directly coherently demodulate AMPSK modulated signals in a microwave frequency band, and belongs to a signal receiving and demodulating technology in digital communication. Background technique [0002] The fast-growing demand for broadband wireless services puts forward higher and higher requirements for wireless communication, which directly leads to more and more crowded radio frequencies in the air, especially with the third-generation (3G) and fourth-generation (4G) broadband mobile With the development of communication networks, the continuous spectrum of lower frequency bands is almost exhausted. The auction price for the right to use the 10MHz spectrum in Europe for 20 years has reached 4 billion euros. In my country, it is difficult to buy the frequency and bandwidth of the "golden band" below ...

AI Technical Summary

Problems solved by technology

[0027] However, in order to digitally process the communication signal, an analog-to-digital converter (ADC) must first be used to convert the received analog signal into a digital signal, but the ADC is usually large in size, high in power consumption, and expensive, and when the signal carrier frequency increases After reaching the microwave and millimeter wave frequency bands, ordinary ADC devices cannot directly sample radio frequency signals, and the advantages of the digital impact filter cannot be brought into play.

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