US Patent No. 10,103,908

LINEAR EQUALIZERS FOR OUTPHASING AMPLIFICATION


Patent No. 10,103,908
Issue Date October 16, 2018
Title Linear Equalizers For Outphasing Amplification
Inventorship Janez Jeraj, Farmington, UT (US)
Johnny M. Harris, Layton, UT (US)
David G. Landon, Bountiful, UT (US)
William K. McIntire, Sandy, UT (US)
Assignee L3 Technologies Inc., New York, NY (US)

Claim of US Patent No. 10,103,908

1. An apparatus for relative or absolute equalization of two or more channels, the apparatus comprising:a receiver configured to receive a variable-envelope signal;
an outphasing separator configured to split the received variable-envelope signal into first and second constant-envelope signals;
a first linear pre-equalizer configured to equalize the first constant-envelope signal relative to the second constant-envelope signal and provide a first pre-equalized constant-envelope signal;
a second linear pre-equalizer configured to equalize the second constant-envelope signal relative to the first constant-envelope signal and provide a second pre-equalized constant-envelope signal;
an analog combiner configured to combine the first and second pre-equalized constant-envelope signals; and
a feedback loop comprising at least one processor configured to:
receive the combined first and second pre-equalized constant-envelope signals as inputs;
analyze the received combined first and second pre-equalized constant-envelope signals to identify one or more pre-equalization inputs that, when applied to the first and/or the second linear pre-equalizers, equalize the first and/or second pre-equalized constant-envelope signals relative to each other; and
provide the identified pre-equalization inputs to the first and/or the second linear pre-equalizers, such that the combined first and second pre-equalized constant-envelope signals are equalized relative to each other.