Patent ID: 9419727
Filing Date: 2016-08-16
CPC Classification: H04B

Claim Text:
1. A communications method comprising the following steps: emitting a series of pulses from a transmitter through water, wherein each pulse comprises a plurality of electromagnetic component signals, wherein each component signal has a fixed combination of wavelength and polarization state that differs from the wavelength and polarization state combinations corresponding to the other component signals, and wherein the wavelength of each component signal has a wavelength selected from a group of four wavelengths, all of which are in a blue-green region of an electromagnetic spectrum, and wherein each component signal has one of at least two different polarization states; encoding data onto each pulse by varying the amplitude of selected component signals of each pulse; receiving each pulse with a receiver; and retrieving the data by detecting the component signals based on the component signals' wavelength, polarization state, and amplitude.