公开(公告)号：US20170099109A1

公开(公告)日：2017-04-06

申请号：US14969852

申请日：2015-12-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： MEHMET ALI DONMEZ ,  ANAND GANESH DABAK ,  IL HAN KIM ,  TIMOTHY MARK SCHMIDL

IPC: H04B10/556 ,  H04L5/00 ,  H04B3/10

CPC classification number: H04B10/556 ,  H04B3/10 ,  H04L5/0048 ,  H04L27/106 ,  H04L27/14

Abstract: An ultrasonic communication circuit is disclosed. The circuit includes an ultrasonic transmitter arranged to transmit a training signal having a frequency to a remote transceiver over an ultrasonic communication channel. An ultrasonic receiver is arranged to receive information from the remote transceiver in response to the training signal. The ultrasonic transmitter is arranged to transmit a data signal to the remote transceiver. The data signal has a duty cycle determined by the information.

公开(公告)号：US20170099114A1

公开(公告)日：2017-04-06

申请号：US14969330

申请日：2015-12-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： MEHMET ALI DONMEZ ,  ANAND GANESH DABAK ,  IL HAN KIM ,  TIMOTHY MARK SCHMIDL

IPC: H04B11/00

CPC classification number: H04B11/00 ,  H04L27/122 ,  H04L27/144

Abstract: A method of encoding a plurality of data signals is disclosed. The method includes selecting a set of M ultrasonic frequencies, wherein each of the M ultrasonic frequencies differs from an adjacent frequency by at least a first frequency spacing, and wherein M is a positive integer. An encoder receives the plurality of data signals. Each of the plurality of data signals is encoded by a respective set of Q of the M ultrasonic frequencies, wherein Q is a positive integer less than M. A minimum frequency separation between any pair of the Q ultrasonic frequencies of any respective set is greater than the first frequency spacing.