The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2022
Filed:
Jul. 14, 2020
Amazon Technologies, Inc., Seattle, WA (US);
Murali Krishnan, Bellevue, WA (US);
Timothy Leo Gallagher, Woodinville, WA (US);
Torbjorn Larsson, San Diego, CA (US);
AMAZON TECHNOLOGIE, INC., Seattle, WA (US);
Abstract
A constellation of many satellites and associated ground stations provide communication service to user terminals. These devices use modulation techniques such as orthogonal frequency division multiplexing (OFDM) to send large quantities of data. For transmission, a power amplifier increases the amplitude of a waveform modulated in this way. The power amplifier operates more efficiently closer to saturation. However, operation at saturation results in nonlinear distortion, producing unwanted signals and increasing bit error rate. A set of techniques are used to reduce the peak to average power ratio (PAPR) of the waveform provided to the power amplifier. A distortionless technique remaps blocks of bits to reduce the resulting PAPR of that block. Additional techniques may also be progressively applied to reduce PAPR while minimizing adverse consequences such as in-band distortion, out of band emissions, increased bit error rate, and so forth. These techniques may include filtering, peak cancellation, and circular clipping.