Method and system for digital communication over an acoustic channel
AssigneeCue Audio, LLC
InventorsTimur Kelin, Jameson Rader
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Abstract
A method for providing digital communication over an acoustic channel is disclosed. The method includes dividing an operating frequency band of the acoustic channel into multiple adjacent non-overlapping subbands of an equal bandwidth, selecting subbands based on a symbol to be transmitted, generating a signal with linear frequency modulation in each of the selected subbands, combining the signals with linear frequency modulation, and transmitting the combined signals to the acoustic channel through an acoustic system, wherein slopes of linear frequency modulation for the signals with linear frequency modulation are equal.
Claims8
A method of generating and transmitting combined linear frequency modulated signal carrying data, comprising:
- selecting a frequency-domain vector on the basis of a symbol;
- transforming the frequency-domain vector into a kernel vector;
- generating a time-domain vector, wherein the generating the time-domain vector comprises cyclic shifting of the kernel vector using a plurality of cyclic shifters and repeatedly copying an output of a respective cyclic shifter of the plurality of cyclic shifters using a plurality of copying blocks;
- multiplying elements of the time-domain vector by a signal with linear frequency modulation;
- and
- transmitting the result of the multiplication to an acoustic channel through a plurality of acoustic systems of one or more electronic devices.
Dependencies are inferred from the claim text.