Pre-distortion of input signals to form constant envelope signal outputs
AssigneeSouthwest Research Institute
InventorMichael E. Pilcher
Life of this patent
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Abstract
A plurality of input signals are pre-distorted for combination into a first combined signal having a constant envelop. The input signals are combined into a second combined signal, and a similarity between each of the input signals and the second combined signal is measured. Ones of the input signals are selected and attenuated based on the similarity measurement. The attenuated input signals and non-attenuated signals are output for combination to form the first combined signal.
Claims27
A method for generating a constant envelop combined signal, comprising:
- generating a combined signal that is a combination of a plurality of input signals;
- attenuating selected ones of the input signals to generate attenuated input signals;
- and
- outputting the attenuated input signals and other non-attenuated input signals for generating the constant envelop combined signal.
A method for generating a constant envelop combined signal, comprising:
- generating a combined signal that is a combination of a plurality of input signals;
- generating a similarity measurement between each of the input signals and the combined signal;
- comparing the similarity measurements with one of a predetermined selection threshold value or a parameter based on a combined signal power value to generate comparison results;
- selecting the ones of the input signals based on the comparison results;
- attenuating the selected ones of the input signals to generate attenuated input signals;
- and outputting the attenuated input signals and other non-attenuated input signals for generating the constant envelop combined signal.
An apparatus that outputs signals that combines into a constant envelop combined signal, comprising:
- a controller;
- and
- a memory coupled to the controller, the controller generating a combined signal that is a combination of a plurality of input signals, and attenuating selected ones of the input signals to generate attenuated input signals, wherein the attenuated input signals and other non-attenuated input signals may be output for combination to form the constant envelop combined signal.
An apparatus that outputs signals that combines into a constant envelop combined signal, comprising:
- a controller;
- a memory coupled to the controller;
- a combiner that generates a combined signal that is a combination of a plurality of input signals;
- a similarity measurement device that generating a similarity measurement between each of the input signals and the combined signal;
- and
- an attenuation value generator that selects ones of the input signals based on the similarity measurement;
- an attenuator that attenuates the selected ones of the input signals to generate attenuated input signals;
- and
- an output interface that outputs the attenuated input signals and other non-attenuated input signals that may be combined to form the constant envelop combined signal.
A device for generating a constant envelop combined signal, comprising:
- means for generating a combined signal that is a combination of a plurality of input signals;
- means for generating a similarity measurement between each of the input signals and the combined signal;
- means for comparing the similarity measurements with one of a predetermined selection threshold value or a parameter based on a combined signal power value to generate comparison results;
- means for selecting the ones of the input signals based on the comparison results;
- means for attenuating the selected ones of the input signals to generate attenuated input signals;
- and
- means for outputting the attenuated input signals and other non-attenuated input signals for generating the constant envelop combined signal.
Dependencies are inferred from the claim text.