Peak to average power ratio suppression

1. A system comprising:

a first peak-to-average-power ratio (PAPR) suppression circuit, a second peak-to-average-power ratio (PAPR) suppression circuit, and a first carrier aggregation modulator, said first PAPR suppression circuit comprising a plurality of second modulators,

wherein:

said first PAPR suppression circuit is operable to:

receive a first sequence of time-domain symbols to be transmitted;

alter said first sequence to generate a plurality of second sequences of time-domain symbols;

measure a PAPR corresponding to each of said second sequences; and

convey information related to at least a portion of said measurement to said second PAPR suppression circuit;

said second PAPR suppression circuit is operable to:

receive said first sequence of time-domain symbols to be transmitted; and

alter said first sequence based on said conveyed information to generate a third symbol sequence;

said first carrier aggregation modulator is operable to modulate said third symbol sequence; and

said plurality of second modulators is operable to perform same operations as said first modulator using lower resolution than said first modulator.

2. The system of claim 1 , wherein said operations comprise:

demultiplexing of a symbol sequence into a plurality of subsequences; and

upconverting each of said plurality of subsequences to a different one of a plurality of frequency bands.

3. The system of claim 1 , wherein said conveyed information comprises symbol ordering and/or inversion descriptors.

4. The system of claim 1 , wherein said conveyed information is selected based on a random number.

5. The system of claim 1 , wherein said conveyed information is selected based on collected statistics regarding symbol descriptors used for previous symbol sequences.

6. The system of claim 1 , wherein said alteration of said first sequence based on said conveyed information comprises a reordering of symbols of said first sequence and/or a phase shift of one or more symbols of said first sequence.

7. The system of claim 1 , wherein said first sequence of time-domain symbols comprises symbols from a plurality of symbol sources.

8. A method comprising:

in a transmitter comprising a first peak-to-average-power ratio (PAPR) suppression circuit, a second peak-to-average-power ratio (PAPR) suppression circuit, and a first carrier aggregation modulator, said first PAPR suppression circuit comprising a plurality of second modulators:

receiving, by said first PAPR suppression circuit, a first sequence of time-domain symbols to be transmitted;

altering, by said first PAPR suppression circuit, said first sequence based on each of a plurality of symbol descriptors to generate a corresponding plurality of second sequences of time-domain symbols;

measuring, by said first PAPR suppression circuit, a PAPR corresponding to each of said second sequences;

selecting, by said first PAPR suppression circuit, one of said plurality of symbol descriptors based on said measurement of PAPR;

conveying, by said first PAPR suppression circuit, said selected one of said symbol descriptors to said second PAPR suppression circuit;

receiving, by said second PAPR suppression circuit, said first sequence of time-domain symbols to be transmitted;

altering, by said second PAPR suppression circuit, said first sequence based on said selected one of said symbol descriptors to generate a third symbol sequence

modulating, by said first carrier aggregation modulator, said third symbol sequence;

performing, by said first carrier aggregation modulator, modulation operations using a first resolution; and

performing, by each of said second modulators, said modulation operations using a second resolution that is lower than said first resolution.

9. The method of claim 8 , wherein said operations comprise:

demultiplexing a symbol sequence into a plurality of subsequences; and

upconverting each of said plurality of subsequences to a different one of a plurality of frequency bands.

10. The method of claim 8 , comprising selecting, by said first PAPR suppression circuit, said plurality of symbol descriptors from a set of possible symbol ordering and/or inversion descriptors.

11. The method of claim 8 , wherein said selecting is random.

12. The method of claim 8 , wherein said selecting is based on collected statistics regarding symbol descriptors used for previous symbol sequences.

13. The method of claim 8 , wherein said altering said first sequence based on said selected one of said symbol descriptors comprises reordering symbols of said first sequence and/or phase shifting one or more symbols of said first sequence.

14. The method of claim 8 , wherein said first sequence of time-domain symbols comprises symbols from a plurality of symbol sources.