US 11,870,620 B2
Satellite receiver including pre-equalizer to compensate for linear impairments
Bala Subramaniam, Potomac, MD (US)
Assigned to Hughes Networks Systems, Germantown, MD (US)
Filed by Bala Subramaniam, Potomac, MD (US)
Filed on Dec. 29, 2021, as Appl. No. 17/646,359.
Prior Publication US 2023/0208687 A1, Jun. 29, 2023
Int. Cl. H04L 27/01 (2006.01); H04L 25/03 (2006.01)
CPC H04L 27/01 (2013.01) [H04L 25/03019 (2013.01); H04L 25/03891 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A non-transitory computer-readable storage medium having instructions embodied thereon, the instructions being executable by one or more processors to perform a method for compensating for linear impairments at a receiver, the method comprising:
receiving an Rx signal comprising an asymmetric response of a satellite filter;
pre-equalizing the Rx signal with a coefficient;
demodulating, after the pre-equalizing, the Rx signal;
detecting a Pre-Equalizer PLS (Physical Layer Scrambling) code in a PL header embedded in the Rx signal;
capturing a received training sequence after the detecting;
computing the coefficient to converge the received training sequence with a known sequence; and
updating the coefficient of the pre-equalizing to the computed coefficient.