US 12,143,151 B1
Systems and methods for fast searching of wideband IQ modulation image rejection
Minheng Shan, Rockville, MD (US); and Kumud Patel, Clarksburg, MD (US)
Assigned to Hughes Network Systems, LLC, Germantown, MD (US)
Filed by Hughes Network Systems, LLC, Germantown, MD (US)
Filed on Apr. 24, 2023, as Appl. No. 18/306,002.
Int. Cl. H04B 1/71 (2011.01); H04B 1/719 (2011.01); H04L 27/36 (2006.01)
CPC H04B 1/719 (2013.01) [H04L 27/364 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device to facilitate image rejection for a radio frequency signal with a wideband carrier, the device comprising:
one or more processing devices; and
memory communicatively coupled with and readable by the one or more processing devices and having stored therein processor-readable instructions which, when executed by the one or more processing devices, cause the one or more processing devices to perform operations comprising:
analyzing one or more wideband signals from a device, where:
the one or more wideband signals correspond to a wideband channel;
each wideband signal of the one or more wideband signals corresponds to a sinusoidal electrical signal with IQ amplitude and phase modulation; and
the analyzing comprises:
determining an in-phase component (I) of at least one wideband signal of the one or more wideband signals;
determining a quadrature component (Q) of the at least one wideband signal;
based at least in part on the determined I and Q,
determining a wideband IQ imbalance of the at least one wideband signal;
obtaining a scalar error based at least in part on the wideband IQ imbalance;
mapping the scalar error to a vector error plane;
determining orthogonal error vector points that are based at least in part on the mapping; and
compensating for the wideband IQ imbalance of the device based at least in part on adjusting an IQ setting of the device with the orthogonal error vector points.