公开(公告)号：US10164714B2

公开(公告)日：2018-12-25

申请号：US15362390

申请日：2016-11-28

Applicant: Intel Corporation

Inventor： Richard D. Roberts ,  Praveen Gopalakrishnan ,  Mathys C. Walma

IPC: H04L27/10 ,  H04B10/556 ,  H04B10/116 ,  H04B10/50 ,  H04L27/04 ,  H04L27/12

Abstract: Embodiments may provide a way of communicating via an electromagnetic radiator, or light source, that can be amplitude modulated such as light emitting diode (LED) lighting and receivers or detectors that can determine data from light received from the amplitude modulated electromagnetic radiator. Some embodiments may provide a waveform in the form of chips at a chipping clock frequency that switch a light source between on and off states to communicate via light sources that can be amplitude modulated such as LED lighting. Some embodiments may provide a method of transmitting the waveform via modulated LED lighting. Some embodiments are intended for indoor navigation via photogrammetry (i.e., image processing) using self-identifying LED light anchors. In many embodiments, the data signal may be communicated via the light source at amplitude modulating frequencies such that the resulting flicker is not perceivable to the human eye.

公开(公告)号：US20170237502A1

公开(公告)日：2017-08-17

申请号：US15362390

申请日：2016-11-28

Applicant: Intel Corporation

Inventor： Richard D. Roberts ,  Praveen Gopalakrishnan ,  Mathys C. Walma

IPC: H04B10/556 ,  H04L27/04 ,  H04L27/12 ,  H04B10/50

CPC classification number: H04B10/5563 ,  H04B10/116 ,  H04B10/502 ,  H04L27/04 ,  H04L27/12

Abstract: Embodiments may provide a way of communicating via an electromagnetic radiator, or light source, that can be amplitude modulated such as light emitting diode (LED) lighting and receivers or detectors that can determine data from light received from the amplitude modulated electromagnetic radiator. Some embodiments may provide a waveform in the form of chips at a chipping clock frequency that switch a light source between on and off states to communicate via light sources that can be amplitude modulated such as LED lighting. Some embodiments may provide a method of transmitting the waveform via modulated LED lighting. Some embodiments are intended for indoor navigation via photogrammetry (i.e., image processing) using self-identifying LED light anchors. In many embodiments, the data signal may be communicated via the light source at amplitude modulating frequencies such that the resulting flicker is not perceivable to the human eye.

公开(公告)号：US09729247B2

公开(公告)日：2017-08-08

申请号：US14924434

申请日：2015-10-27

Applicant: Intel Corporation

Inventor： Richard D. Roberts ,  Mathys C. Walma ,  Praveen Gopalakrishnan

IPC: H04B10/04 ,  H04B10/564 ,  H04B10/61 ,  H04B10/60 ,  H04J14/00 ,  H04B10/116

CPC classification number: H04B10/564 ,  H04B10/116 ,  H04B10/60 ,  H04B10/616 ,  H04J14/00

Abstract: A light transmitter to transmit multiple light packets, each formatted to include a same message comprising a series of bits, each bit represented as light that is intensity modulated over a bit period at a frequency indicative of the bit. The light packets are transmitted at different start-times to establish different phases, one for each of the light packets, to permit a light receiver to sample each message at a different phase of a fixed sample timeline that is asynchronous to the bit period and the frequency. The light receiver samples the multiple light packets based on the sample timeline, to sample each received message at one of the different sample phases, then constructs a best series of bits based on the multiple demodulated messages.