US 12,113,603 B2
Optically enhanced self-interference cancellation
Steven Hong, Sunnyvale, CA (US); Jeffrey Mehlman, Sunnyvale, CA (US); Joel Brand, Santa Clara, CA (US); Jung-Il Choi, Saratoga, CA (US); and Mayank Jain, Sunnyvale, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 20, 2023, as Appl. No. 18/123,544.
Application 18/123,544 is a continuation of application No. 16/859,625, filed on Apr. 27, 2020, granted, now 11,637,623.
Application 16/859,625 is a continuation of application No. 16/118,979, filed on Aug. 31, 2018, granted, now 10,673,519, issued on Jun. 2, 2020.
Application 16/118,979 is a continuation in part of application No. 14/473,653, filed on Aug. 29, 2014, granted, now 10,177,836, issued on Jan. 8, 2019.
Claims priority of provisional application 61/871,519, filed on Aug. 29, 2013.
Prior Publication US 2023/0246703 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/15 (2006.01); H04B 1/525 (2015.01); H04B 7/155 (2006.01); H04B 7/0413 (2017.01)
CPC H04B 7/15585 (2013.01) [H04B 1/525 (2013.01); H04B 7/0413 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A relay that is single-input single-output and optically-enhanced, the relay comprising:
a first transmitter coupled to a first signal path of the relay, wherein the first transmitter is configured to receive a first digital transmit signal via the first signal path, wherein the first transmitter is configured to convert the first digital transmit signal to a first analog transmit signal, and wherein the first transmitter is configured to transmit the first analog transmit signal via the first signal path;
a first receiver coupled to the first signal path of the relay, wherein the first receiver is configured to receive a first analog receive signal via the first signal path, and wherein the first receiver is configured to convert the first analog receive signal to a first digital receive signal;
a second transmitter coupled to a second signal path of the relay, wherein the second transmitter is configured to receive a second digital transmit signal via the second signal path, wherein the second transmitter is configured to convert the second digital transmit signal to a second analog transmit signal, and wherein the second transmitter is configured to transmit the second analog transmit signal via the second signal path concurrently as the first transmitter transmits the first analog transmit signal;
a second receiver coupled to the second signal path of the relay, wherein the second receiver is configured to receive a second analog receive signal via the second signal path, wherein the second receiver is configured to convert the second analog receive signal to a second digital receive signal; and
an optically-enhanced analog self-interference canceller coupled to at least the first signal path, wherein the optically-enhanced analog self-interference canceller includes an optical upconverter and an optical signal transformer and an optical downconverter, wherein the optically-enhanced analog self-interference canceller is configured to process at least one of the first digital transmit signal or the first analog transmit signal using at least the optical upconverter and the optical signal transformer and the optical downconverter to generate a first self-interference cancellation signal, and wherein the optically-enhanced analog self-interference canceller is configured to combine the first self-interference cancellation signal with at least one of the first digital receive signal or the first analog receive signal, wherein the optical upconverter is configured to convert a sub-optical frequency range to an optical frequency range, wherein the optical signal transformer is configured to apply at least one signal transformation to an optical signal, and wherein the optical downconverter is configured to convert the optical frequency range to the sub-optical frequency range.