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 modulator, wherein:

said first PAPR suppression circuit is operable to:

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

alter said first sequence based on each of a plurality of symbol ordering and/or inversion descriptors to generate a corresponding plurality of second sequences of time-domain symbols;

measure a PAPR corresponding to each of said second sequences;

select one of said plurality of symbol ordering and/or inversion descriptors based on said measurement of PAPR; and

convey said selected one of said symbol ordering and/or inversion descriptors to said second PAPR suppression circuit; and

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 selected one of said symbol ordering and/or inversion descriptors to generate a reordered and/or inverted symbol sequence; and

said first modulator is operable to:

modulate said reordered and/or inverted sequence onto one or more carriers.

2. The system of claim 1 , wherein said first modulator is a carrier aggregation modulator.

3. The system of claim 1 , wherein said first PAPR suppression circuit comprises a plurality of second modulators.

4. The system of claim 3 , wherein each of said second modulators is operable to perform same operations as said first modulator using lower-resolution than said first modulator.

5. The system of claim 4 , 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.

6. The system of claim 1 , wherein said plurality of symbol ordering and/or inversion descriptors is selected from a larger set of possible symbol ordering and/or inversion descriptors.

7. The system of claim 1 , wherein said selection is random.

8. The system of claim 1 , wherein said selection is based on collected statistics regarding symbol ordering and/or inversion descriptors used for previous symbol sequences.

9. The system of claim 1 , wherein said alteration of said first sequence based on said selected one of said symbol ordering and/or inversion descriptors comprises a reordering of symbols of said first sequence and/or a phase shift of one or more symbol of said first sequence.

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

11. 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 modulator:

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 ordering and/or inversion 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 ordering and/or inversion descriptors based on said measurement of PAPR;

conveying, by said first PAPR suppression circuit, said selected one of said symbol ordering and/or inversion 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 ordering and/or inversion descriptors to generate a reordered and/or inverted symbol sequence; and

modulating, by said first modulator, said reordered and/or inverted sequence onto one or more carriers.

12. The method of claim 11 , wherein said first modulator is a carrier aggregation modulator.

13. The method of claim 11 , wherein said first PAPR suppression circuit comprises a plurality of second modulators.

14. The method of claim 11 , comprising:

performing, by said first 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.

15. The method of claim 14 , 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.

16. The method of claim 11 , comprising selecting, by said first PAPR suppression circuit, said plurality of symbol ordering and/or inversion descriptors from a larger set of possible symbol ordering and/or inversion descriptors.

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

18. The method of claim 11 , wherein said selecting is based on collected statistics regarding symbol ordering and/or inversion descriptors used for previous symbol sequences.

19. The method of claim 11 , wherein said altering said first sequence based on said selected one of said symbol ordering and/or inversion descriptors comprises reordering symbols of said first sequence and/or phase shifting one or more symbol of said first sequence.

20. The method of claim 11 , wherein said first sequence of time-domain symbols comprises symbols from a plurality of symbol sources.