US 11,902,411 B2
Wireless devices and systems including examples of cross correlating wireless transmissions
Fa-Long Luo, San Jose, CA (US); Tamara Schmitz, Scotts Valley, CA (US); Jeremy Chritz, Seattle, WA (US); and Jaime Cummins, Bainbridge Island, WA (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by MICRON TECHNOLOGY, INC., Boise, ID (US)
Filed on Dec. 13, 2022, as Appl. No. 18/065,097.
Application 18/065,097 is a continuation of application No. 17/090,123, filed on Nov. 5, 2020, granted, now 11,539,502.
Application 17/090,123 is a continuation of application No. 16/426,518, filed on May 30, 2019, granted, now 10,841,076, issued on Nov. 17, 2020.
Application 16/426,518 is a continuation of application No. 15/374,831, filed on Dec. 9, 2016, granted, now 10,333,693, issued on Jun. 25, 2019.
Prior Publication US 2023/0115548 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 7/04 (2006.01); H04L 27/00 (2006.01); H04L 27/26 (2006.01)
CPC H04L 7/042 (2013.01) [H04L 27/0006 (2013.01); H04L 27/2647 (2013.01); H04L 27/2663 (2013.01); H04L 27/2678 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a plurality of antennas;
a transceiver configured to transmit, receive, or both, signals to, from, or both, at least a first antenna of the plurality of antennas;
a communication detector coupled to the transceiver and configured to calculate a statistic including a cross-correlation of symbols indicative of radio frequency (RF) energy received from at least two of the plurality of antennas including the first antenna in a particular portion of a wireless spectrum via the transceiver,
the communication detector configured to provide a signal indicative of a presence or absence of a wireless communication signal in the particular portion of the wireless spectrum based, at least in part, on a comparison of the statistic with a threshold; and
a decoder/precoder configured to receive the signal indicative of the presence or absence of the wireless communication signal, wherein the decoder/precoder is further configured to power on into a power on state of the decoder/precoder responsive to receiving the signal indicative of the presence of the wireless communication signal, wherein the decoder/precoder is further configured to power off into a power off state of the decoder/precoder responsive to receiving the signal indicative of the absence of the wireless communication signal,
the communication detector configured to autocorrelate respective powers of the symbols indicative of RF energy received from the at least two of the plurality of antennas to calculate an additional statistic,
the communication detector configured to provide an additional signal indicative of an absence of the wireless communication signal in the particular portion of the wireless spectrum based, at least in part, on a comparison of the additional statistic with an additional threshold, and
wherein the decoder/precoder is further configured to power off into the power off state of the decoder/precoder responsive to receiving the additional signal indicative of the absence of the wireless communication signal.