US 11,785,561 B2
Digital channelizer with predistorter, high-power amplifier, and beamforming
Hyuck M. Kwon, Wichita, KS (US); Madhuprana Goswami, Wichita, KS (US); Vidhi Rana, Wichita, KS (US); and Khanh Pham, Albuquerque, NM (US)
Assigned to WICHITA STATE UNIVERSITY, Wichita, KS (US)
Filed by Wichita State University, Wichita, KS (US)
Filed on Jun. 29, 2021, as Appl. No. 17/361,962.
Claims priority of provisional application 63/047,043, filed on Jul. 1, 2020.
Prior Publication US 2022/0007311 A1, Jan. 6, 2022
Int. Cl. H04W 52/52 (2009.01); H04B 7/185 (2006.01); H04B 7/19 (2006.01); H04W 52/24 (2009.01); H04B 7/26 (2006.01); H04B 1/59 (2006.01)
CPC H04W 52/52 (2013.01) [H04B 1/59 (2013.01); H04B 7/18517 (2013.01); H04B 7/19 (2013.01); H04B 7/2621 (2013.01); H04W 52/243 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A satellite communications system comprising:
a ground controller;
a decode-and-forward satellite transponder having a transponder front end including a digital channelizer and a predistorter; and
a digital high-power amplifier;
wherein the ground controller is configured to transmit multiple-access frequency-division-multiplexed signals to the decode-and-forward satellite transponder;
wherein the decode-and-forward satellite transponder is configured to down-convert the signals received from the ground controller at the transponder front end;
wherein the digital channelizer is configured to convert the signals received from the ground controller into a single sample stream and feed the single sample stream through the predistorter into the single digital high-power amplifier;
wherein the single digital high power amplifier is configured to amplify each input sample of the sample stream in sample-by-sample fashion and generate a discrete output; and
wherein the decode-and-forward satellite transponder is configured to convert the output of the digital high power amplifier to a continuous time signal and up-convert the output with a main carrier frequency for down-link transmission to multiple-access ground users.