Methods and apparatus for multiphase sampling of modulated light

Patent metadata

Field	Value
Publication number	US-9203541-B2
Application number	US-201213630066-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Sep 28, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

A light transmitter transmits 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.

First claim

What is claimed is:

1. A non-transitory computer readable medium encoded with a computer program, including instructions to cause a processor to:
cause a light detector array including spatially-successive lines of light detectors to sample light energy impinging thereon when exposed, the light energy conveying a bit value as light that is intensity modulated to multiple intensity levels at a frequency indicating a bit value;
sequentially expose the spatially-successive lines of…

Assignees

• Intel Corp

Inventors

• Roberts Richard D
• Walma Mathys C
• Gopalakrishnan Praveen

Classifications

• H04J14/00 Primary

  Electricity · mapped topic

• H04B10/616

  Electricity · mapped topic

• H04B10/60

  Electricity · mapped topic

• H04B10/116 Primary

  Electricity · mapped topic

• H04B10/564 Primary

  Electricity · mapped topic