US 12,267,116 B2
Mutual coupling based calibration
Sriram Jayasimha, Leicester (GB); Christos Kasparis, Miami, FL (US); Peter King, Miami, FL (US); David Wheeler, Miami, FL (US); and Huiwen Yao, Potomac, MD (US)
Assigned to AST & Science, LLC, Miami, FL (US)
Filed by AST & Science, LLC, Miami, FL (US)
Filed on Jan. 12, 2023, as Appl. No. 18/096,224.
Application 18/096,224 is a continuation of application No. 17/696,547, filed on Mar. 16, 2022, granted, now 11,581,958.
Claims priority of provisional application 63/161,701, filed on Mar. 16, 2021.
Prior Publication US 2023/0239060 A1, Jul. 27, 2023
Int. Cl. H04B 17/12 (2015.01); H04L 27/26 (2006.01)
CPC H04B 17/12 (2015.01) [H04L 27/2626 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An antenna array, comprising:
a plurality of antenna elements, each of the plurality of antenna elements having a transmit path; and
a processing device configured to feed an orthogonal-frequency-division-multiplexing (OFDM) calibration signal to the transmit path to perform transmit calibration, and to compute phase and amplitude of a given one of the plurality of antenna elements and each neighboring antenna element of the plurality of direct neighboring antenna elements, according to a plurality of received OFDM signals;
wherein the OFDM calibration signal is orthogonalized to reduce cross-interference among multiple active transmitting ones of the plurality of antenna elements.