Frequency domain power distributor for AMPSK (Asymmetric M-ary Phase Shift Keying) simultaneous wireless information and power transfer system

Abstract

The invention discloses a frequency domain power distributor for an AMPSK (Asymmetric M-ary Phase Shift Keying) simultaneous wireless information and power transfer system, which is different from the conventional time domain power distribution scheme, a receiving signal is decomposed to two parts on a frequency domain by the power distributor, wherein a carrier frequency component is used for energy harvesting, and a sideband component is used for information demodulation; through the power distributor, demodulation of a modulating signal can be completed while carrier energy of the receiving signal is extracted for supplying power to equipment, therefore, simultaneous transfer of information and energy can be really achieved through sending one way of signals only. The power distributor is a three-port network formed by a 3dB branch directional coupler and a power synthesis circuit. According to the frequency domain power distributor, on the premise of keeping the advantages of high spectral efficiency of the AMPSK modulating signal, quick information throughput rate and the like, the potential of a sine-like mechanism reserving the carrier is fully explored, and the frequency domain power distributor is one of constituent parts of the AMPSK simultaneous wireless information and power transfer system.

Description

technical field [0001] The invention relates to a frequency-domain power divider based on a microstrip circuit design, the power divider is AMPSK (Asymmetric M-ary Phase Shift Keying, asymmetric multi-phase shift keying) wireless energy carrying for simultaneous transmission of information and energy Designed for communication systems, it belongs to the cross field of digital communication signal processing technology and wireless power transmission technology. Background technique [0002] With the rapid development of society, interdisciplinary and multi-platform integration and integration have gradually become an important trend of technological innovation and the source of power for industrial progress. Energy and radio spectrum are increasingly scarce resources. Therefore, there is an urgent need to integrate the existing research results of communication technology and energy technology, to innovate, and to meet people's needs for efficient and reliable information i...

AI Technical Summary

Problems solved by technology

[0005] It is well known in the art that a sine wave is a power-type signal, and its Fourier transform is an impact function. The energy in the frequency domain is highly concentrated, and it is the best form of energy-carrying signal. However, a pure sine wave has a theoretical bandwidth of zero and cannot transmit any useful information.

If the frequency of the sine wave is kept constant, but other waveform parameters (amplitude, phase, shape, symmetry, or number of cycles, etc.) are slightly modulated, the energy is still highly concentrated in the on carrier frequency

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