Power-based decoding of data received over an optical communication path

Patent metadata

Field	Value
Publication number	US-10897315-B2
Application number	US-201916388340-A
Country	US
Kind code	B2
Filing date	Apr 18, 2019
Priority date	Apr 18, 2019
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A system for transmitting data over an optical communication path is configured to receive data to be encoded in a bitstream for transmission using an optical communication path and encodes the received data to obtain a bitstream. The system is further configured to determine that the bitstream includes a sequence of consecutive bits, and obtain a power level at which to transmit a portion of the bitstream based on a count of the consecutive bits in the sequence. The system may be configured to selectively activate a light source at a power level according to a modulation scheme to optically transmit the portion of the bitstream at the power level.

First claim

We claim:

1. A method for receiving data over an optical communication path at a receiving device, the method comprising:
determining a first power level transmitted by a transmitter over the optical communication path at a first timeslot based upon a first received photon having a value, the first power level is a threshold power level;
determining a second power level transmitted by a transmitter over the optical communication path at a second timeslot following the first timeslot and based upon a second received photon having the value, the second power level not exceeding the threshold power level;
creating a first bit sequence of repeating values of the value from the first received photon, a count of the first bit sequence of repeating values determined based on a mapping of the first power level to the count, wherein the count is proportional to the first power level;
creating a second bit sequence of repeating values of the value from the second received photon, the second bit sequence comprising a second count of the second bit sequence of repeating values based on the mapping and the second count being proportional to the second power level;
combining the first and second bit sequences into a bitstream; and
storing the bitstream in a memory.

2. The method of claim 1 , wherein determining the first power level comprises applying a detection model to the first received photon, and wherein the detection model includes a Poisson regression model.

3. The method of claim 2 , wherein the detection model is configured to detect a value at a power level above the threshold power level.

4. The method of claim 1 , wherein the memory is a Random Access Memory (RAM).

5. The method of claim 1 , wherein the first bit sequence is a binary bit sequence and the repeating values are a binary value of one.

6. The method of claim 1 , wherein the received photon is received over the optical communication path, the optical communication path comprising a fiber optic.

7. The method of claim 1 , wherein the mapping comprises an increase in power level that is non-linear with increases in count.

8. A system for receiving data over an optical communication path at a receiving device, the system comprising:
a hardware processor; and
a computer-readable storage device having computer-executable instructions stored thereon, which when executed by the hardware processor, configure the system to:
determine a first power level transmitted by a transmitter over the optical communication path at a first timeslot based upon a first received photon having a value, the first power level is a threshold power level;
determine a second power level transmitted by a transmitter over the optical communication path at a second timeslot following the first timeslot and based upon a second received photon having the value, the second power level not exceeding the threshold power level;
create a first bit sequence of repeating values of the value from the first received photon, a count of the first bit sequence of repeating values determined based on a mapping of the first power level to the count, wherein the count is proportional to the first power level;
create a second bit sequence of repeating values of the first value from the second received photon, the second bit sequence comprising a second count of the second bit sequence of repeating values based on the mapping and the second count being proportional to the second power level;
combine the first and second bit sequences into a bitstream; and
store the bitstream in a memory.

9. The system of claim 8 , wherein determining the first power level comprises applying a detection model to the first received photon, and wherein the detection model includes a Poisson regression model.

10. The system of claim 9 , wherein the detection model is configured to detect a value at a power level above the threshold power level.

11. The system of claim 8 , wherein the memory is a Random Access Memory (RAM).

12. The system of claim 8 , wherein the first bit sequence is a binary bit sequence and the repeating values are a binary value of one.

13. The system of claim 8 , wherein the received photon is received over the optical communication path, the optical communication path comprising a fiber optic.

14. The system of claim 8 , wherein the mapping comprises an increase in power level that is non-linear with increases in count.

15. At least one non-transitory machine-readable medium including instructions for receiving data over an optical communication path at a receiving device, which when executed by a hardware processor, cause the hardware processor to:
determine a first power level transmitted by a transmitter over the optical communication path at a first timeslot based upon a first received photon having a value, the first power level is a threshold power level;
determine a second power level transmitted by a transmitter over the optical communication path at a second timeslot following the first timeslot and based upon a second received photon having the value, the second power level not exceeding the threshold power level;
create a first bit sequence of repeating values of the value from the first received photon, a count of the first bit sequence of repeating values determined based on a mapping of the first power level to the count, wherein the count is proportional to the first power level;
create a second bit sequence of repeating values of the value from the second received photon, the second bit sequence comprising a second count of the second bit sequence of repeating values based on the mapping and the second count being proportional to the second power level;
combine the first and second bit sequences into a bitstream; and
store the bitstream in a memory.

16. The at least one machine-readable medium of claim 15 , wherein determining the first power level comprises applying a detection model to the first received photon, and wherein the detection model includes a Poisson regression model.

17. The at least one machine-readable medium of claim 16 , wherein the detection model is configured to detect a value at a power level above the threshold power level.

18. The at least one machine-readable medium of claim 15 , wherein the memory is a Random Access Memory (RAM).

19. The at least one machine-readable medium of claim 15 , wherein the first bit sequence is a binary bit sequence and the repeating values are a binary value of one.

20. The at least one machine-readable medium of claim 15 , wherein the received photon is received over the optical communication path, the optical communication path comprising a fiber optic.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Hassan Amer Aref
• Chen Wei-Chen

Classifications

• H04B10/66

  Non-coherent receivers, e.g. using direct detection · CPC title

• H04L27/38

  Demodulator circuits; Receiver circuits · CPC title

• H03M7/6047

  Power optimization with respect to the encoder, decoder, storage or transmission · CPC title

• H04B10/541 Primary

  Digital intensity or amplitude modulation · CPC title

• H04B10/25

  Arrangements specific to fibre transmission · CPC title