US 12,463,710 B2
Intercepting satellite telephone signals for surveillance
John Beckner, Munich (DE); and Gary Goodrum, Colo de Caza, CA (US)
Assigned to Horizon Technologies Consultants, Ltd., Reading (GB)
Filed by Horizon Technologies Consultants, Ltd., Reading (GB)
Filed on Mar. 4, 2024, as Appl. No. 18/594,905.
Application 18/594,905 is a continuation of application No. 17/878,250, filed on Aug. 1, 2022, granted, now 11,962,391.
Application 17/878,250 is a continuation of application No. 16/939,379, filed on Jul. 27, 2020, granted, now 11,438,056, issued on Sep. 6, 2022.
Application 16/939,379 is a continuation of application No. 15/693,287, filed on Aug. 31, 2017, granted, now 10,727,932, issued on Jul. 28, 2020.
Claims priority of provisional application 62/381,909, filed on Aug. 31, 2016.
Prior Publication US 2024/0405848 A1, Dec. 5, 2024
Int. Cl. H04B 7/185 (2006.01); H04L 1/00 (2006.01); H04W 80/06 (2009.01); H04W 84/06 (2009.01)
CPC H04B 7/18504 (2013.01) [H04B 7/18565 (2013.01); H04L 1/0045 (2013.01); H04W 80/06 (2013.01); H04W 84/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for surveillance of satellite telephone radio frequency (RF) signals, the system comprising:
a first antenna configured to receive signals at frequencies corresponding to an uplink from a mobile device being transmitted to a communications satellite,
a second antenna configured to receive signals at frequencies corresponding to a downlink transmitted from the communications satellite to a mobile device, and
a signal processing unit configured to:
receive, from the first antenna, RF signals in a satellite frequency band from an uplink by a satellite telephone handset, being transmitted to a communications satellite;
receive, from the second antenna, RF signals in a satellite frequency band from a downlink by a communications satellite, being transmitted to a satellite telephone handset;
detect a broadcast synchronization channel via the second antenna to determine frequencies being used;
process RF signals in a satellite frequency band detected by the uplink and downlink antennas by
digitizing the received signals, and
packetizing data for transmission remotely to another processor for decoding.