公开(公告)号：US09742499B2

公开(公告)日：2017-08-22

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: H04L27/14 ,  H04B10/556 ,  H04B3/10 ,  H04L5/00

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：US10177858B2

公开(公告)日：2019-01-08

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 ,  H04L27/12 ,  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.

公开(公告)号：US09455851B1

公开(公告)日：2016-09-27

申请号：US14969227

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 ,  H04L27/12 ,  H04L27/144

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

Abstract: A method of encoding a data signal 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. The method further includes forming a trellis matrix and encoding the data signal with the trellis matrix to form a set of Q of the M ultrasonic frequencies, wherein Q is a positive integer less than M, and wherein a minimum frequency separation between any pair of the Q frequencies of the set is greater than the first frequency spacing.

Abstract translation: 公开了一种对数据信号进行编码的方法。 该方法包括选择一组M个超声波频率，其中每个M个超声波频率与相邻频率不同至少第一频率间隔，并且其中M是正整数。 所述方法还包括形成网格矩阵并且用所述网格矩阵对所述数据信号进行编码，以形成所述M个超声波频率的Q的集合，其中Q是小于M的正整数，并且其中， 该组的Q频率大于第一频率间隔。