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US 8,798,181 B1Granted
Method and apparatus for controlling multi-dimensional peak-to-average-power-ratio (PAPR) with constraints
OwnerJohn David Terryinventor
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Abstract
A method and system uses a constrained set of indexed samples to identify a next generation population of samples that exhibits a more desirable signal characteristic. The invention generates an intermediate set of indexed samples which are subjected to a fitness function and next generation calculations to produce next generation indexes for the next population of samples. The next generation indexes population of samples is further constrained over initial indexes for generating a more desirable signal characteristic. In an example, the PAPR for all samples of the population are reduced.
Claims13
A method for controlling the peak-to-average-power ratio (PAPR) for a collection of data samples having OFDM signal components, comprising:
- receiving a data sample signal;
- indexing said data sample signal;
- evaluating the PAPR of said indexed data sample signal;
- preparing a fitness result based on said evaluation;
- subjecting said fitness result to algorithmic process to generate a next generation index;
- preparing a next generation data sample based on said next generation indexes, the PAPR of said next generation data sample being less than said PAPR of said indexed data sample, Wherein said next generation sample comprises multiple constituent protocol streams, wherein said next generation sample conforms to at least one independent international standard, wherein said next generation sample is receivable by a receiver for demodulating and decoding separately each constituent protocol stream of said next generation sample without requiring additional information to be transmitted outside of said protocols, and wherein said calculation of said PAPR of each constituent protocol stream results in a lower PAPR for every constituent stream of the collection.
3 more elements
A method of reducing multi-dimensional Peak-to-Average-Ratio Power Ratio (PAPR) in a collection of aggregate waveforms, wherein each aggregate waveform contains at least a first individual stream constructed using orthogonal frequency multiplexed stream components, the method comprising:
- receiving a first signal;
- sampling said first signal into a plurality of first signal samples;
- sequentially indexing said plurality of first signal samples;
- combining n number of said indexed first signal samples into a set of indexed first signal samples;
- forming a first subset of nS number of said set of indexed first signal samples, wherein nS<n, and wherein said first subset of indexed first signal samples includes a first indexed sample of said set of indexed first signal samples;
- forming a second subset of nS number of set of indexed first signal samples, wherein said second subset of indexed first signal samples includes a last indexed sample of said set of indexed first signal samples;
- forming an augmented set of indexed first signal samples, including appending said first subset of said set of indexed first signal samples to said set of indexed first signal samples, and prepending said second subset of said set of indexed first signal samples to said set of indexed first signal samples;
- generating an augmented set of indexed first signal samples PAPR;
- receiving a second signal;
- sampling said second signal into a plurality of second signal samples;
- sequentially indexing said plurality of second signal samples;
- combining x number of said indexed second signal samples into a set of indexed second signal samples;
- forming a first subset of xS number of said set of indexed second signal samples, wherein xS<x, and wherein said first subset of said set of indexed second signal samples includes a first indexed sample of said set of indexed second signal samples;
- forming a second subset of xS number of said set of indexed second signal samples, wherein said second subset of indexed second signal samples includes a last indexed second signal sample of said set of indexed second signal samples;
- forming an augmented set of indexed second signal samples, including appending said first subset of indexed second signal samples to said set of indexed second signal samples, and prepending said second subset of indexed second signal samples to said set of indexed second signal samples;
- generating an augmented set of indexed second signal samples PAPR;
- generating a first aggregated waveform PAPR based on said augmented set of indexed first signal samples PAPR and said augmented set of indexed second signal samples PAPR;
- receiving a third signal;
- sampling said third signal into a plurality of third signal samples;
- sequentially indexing said plurality of third signal samples;
- combining p number of said indexed third signal samples into a set of indexed third signal samples;
- forming a first subset of pS number of said set of indexed third signal samples, wherein pS<p, and wherein said first subset of set of indexed third signal samples includes a first indexed third signal sample of said set of indexed third signal samples;
- forming a second subset of pS number of said set of indexed third signal samples, wherein said second subset of indexed third signal samples includes a last indexed third signal sample of said set of indexed third signal samples;
- forming an augmented set of indexed third signal samples, including appending said first subset of said set of indexed third signal samples to said set of indexed third signal samples, and prepending said second subset of said set of indexed third signal samples to said set of indexed third signal samples;
- generating an augmented set of indexed third signal samples PAPR;
- receiving a fourth signal;
- sampling said fourth signal into a plurality of fourth signal samples;
- sequentially indexing said plurality of fourth signal samples;
- combining r number of said indexed fourth signal samples into a set of indexed fourth signal samples;
- forming a first subset of rS number of said set of indexed fourth signal samples, wherein rS<r, and wherein said first subset of said set of indexed fourth signal samples includes a first indexed sample of said set of indexed fourth signal samples;
- forming a second subset of rS number of said set of indexed fourth signal samples, wherein said second subset of said set of indexed fourth signal samples includes a last indexed sample of said set of indexed fourth signal samples;
- forming an augmented set of indexed fourth signal samples, including appending said first subset of said set of indexed fourth signal samples to said set of indexed fourth signal samples, and prepending said second subset of said set of indexed fourth signal samples to said set of indexed fourth signal samples;
- generating an augmented set of indexed fourth signal samples PAPR;
- generating a second aggregate waveform PAPR based on said augmented set of indexed third signal samples PAR and said augmented set of indexed fourth signal samples PAPR;
- comparing said first aggregate waveform PAPR and said second aggregate waveform PAPR to determine a next generation PAPR;
- and
- evaluating said next generation PAPR against an initial constraint to produce a fitness result.
34 more elements
An apparatus for minimizing the peak-to-average-power ratio (PAPR) for a collection of data samples having OFDM signal components, comprising:
- an input for receiving said collection of data samples signals, wherein at least one of said data sample signals includes OFDM signal components;
- a processor configured to evaluate the PAPR of said data sample signals, analyze the data samples according to said PAPR and at least one criteria based using an iterative algorithmic process, preparing a next generation data sample based on the results of said analysis, and calculating the PAPR of said next generation data sample;
- an output port configured to output information representing combined waveform of next generation samples, said PAPR of said next generation data sample being less than said PAPR of said indexed data sample,
- wherein said next generation sample comprises multiple constituent protocol streams, wherein said next generation sample conforms to at least one independent international standard, wherein said next generation sample is receivable by a receiver for demodulating and decoding separately each constituent protocol stream of said next generation sample without requiring additional information to be transmitted outside of said protocols, and
- wherein said calculation of said PAPR of each constituent protocol stream results in a lower PAPR for every constituent stream.
2 more elements
Dependencies are inferred from the claim text.