DIGITAL TRANSMITTER OF NEAR-FIELD MAGNETIC COMMUNICATION SYSTEM WITH AMPLITUDE-PHASE MANIPULATION Russian patent published in 2020 - IPC H04B5/02 

FIELD: physics.

SUBSTANCE: digital transmitter of near-field magnetic communication system with amplitude-phase manipulation is intended for arrangement of communication channel by modulation of low-frequency magnetic fields. Device comprises a transmitting magnetic antenna with taps, a modulator with two outputs, at the first output of which a single-bit frequency- or phase-shift keyed signal is generated, and at second output is digital signal corresponding to transmitted symbol amplitude, wherein first output of quadrature modulator is connected to device for generating control signals of bridge voltage inverter, and second - to control input of multiplexer, novel is that transmitting magnetic antenna has taps and, respectively, bridge voltage inverter has several half-bridges connected to antenna, wherein total number of outputs of transmitting magnetic antenna is equal to number of half-bridges and is defined as N=A+1, where A is number of discrete levels of symbols amplitudes of signal constellation of digital manipulation, wherein first half-bridge is controlled through drivers by signals directly from device for generation of control signals, and other half-bridges are controlled through multiplexer.

EFFECT: reduced complexity of making a digital transmitter of near-field magnetic communication system.

1 cl, 2 dwg