US 9,814,051 B1
Identifying angle of departure of multi-antenna transmitters
Eran Shpak, Tel Aviv (IL)
Assigned to DEEYOOK LOCATION TECHNOLOGIES LTD., Tel Aviv (IL)
Filed by Eran Shpak, Tel Aviv (IL)
Filed on Dec. 21, 2016, as Appl. No. 15/385,965.
Application 15/385,965 is a continuation in part of application No. 15/270,010, filed on Sep. 20, 2016.
Int. Cl. H04W 24/00 (2009.01); H04W 72/04 (2009.01); H04L 5/12 (2006.01); H04L 27/26 (2006.01); H04L 29/06 (2006.01); H04W 88/08 (2009.01); H04W 84/12 (2009.01); H04B 7/0413 (2017.01); H04B 7/06 (2006.01)
CPC H04W 72/048 (2013.01) [H04L 5/12 (2013.01); H04L 27/2656 (2013.01); H04B 7/0413 (2013.01); H04B 7/0697 (2013.01); H04L 69/22 (2013.01); H04W 84/12 (2013.01); H04W 88/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for signal processing, comprising:
receiving at a given location at least first and second signals transmitted respectively from at least first and second antennas of a wireless transmitter, the at least first and second signals encoding identical data using a multi-carrier encoding scheme with a predefined cyclic delay between the transmitted signals;
processing the received first and second signals, using the cyclic delay, in order to derive a measure of a phase delay between the first and second signals; and
based on the measure of the phase delay, estimating an angle of departure of the first and second signals from the wireless transmitter to the given location,
wherein processing the received first and second signals comprises computing a temporal correlation function over the first and second signals, and finding the measure of the phase delay responsively to a time difference between peaks in the temporal correlation function.