Legal claims defining the scope of protection, as filed with the USPTO.
1. A receiver comprising: an analog front end circuit operable to receive a nonlinearly distorted orthogonal frequency division multiplexed (OFDM) symbol that is a result of a plurality of symbols transmitted on a plurality of subcarriers; nonlinear distortion modeling circuitry operable to generate a model of nonlinear distortion introduced to said OFDM symbol by a transmitter, wherein: a result of said nonlinear distortion is inter-subcarrier interference in said received OFDM symbol; and said model of said nonlinear distortion is a digital clipping model; and circuitry operable to: iteratively calculate metrics based on said received OFDM symbol and said model of nonlinear distortion; and determine values of said symbols based on said metrics.
2. The receiver of claim 1 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a mathematical and/or logical expression.
3. The receiver of claim 1 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a look-up table.
4. The receiver of claim 3 , wherein said look-up table is indexed based on a transmitted signal power parameter.
5. The receiver of claim 1 , wherein said generation of said model is based on control information received from a transmitter from which said OFDM symbol originated.
6. The receiver of claim 5 , wherein said control information comprises an identification of a type of nonlinear distortion model best suited for use with said OFDM symbol.
7. The receiver of claim 5 , wherein said control information comprises initial values for parameters of said model of said nonlinear distortion model.
8. The receiver of claim 5 , wherein said control information is received during handshaking with said transmitter.
9. The receiver of claim 5 , wherein said control information is received in a preamble of said OFDM symbol.
10. A method comprising: in a receiver: receiving, by an analog front end circuit, a nonlinearly distorted orthogonal frequency division multiplexed (OFDM) symbol that is a result of a plurality of symbols transmitted on a plurality of subcarriers; generating, by nonlinear distortion modeling circuitry, a model of nonlinear distortion introduced to said OFDM symbol by a transmitter, wherein: a result of said nonlinear distortion is inter-subcarrier interference in said received OFDM symbol; and said model of said nonlinear distortion is a digital clipping model; iteratively calculating, by circuitry of said receiver, metrics based on said received OFDM symbol and said model of nonlinear distortion; and determining, by circuitry of said receiver, values of said symbols based on said metrics.
11. The method of claim 10 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a mathematical and/or logical expression.
12. The method of claim 10 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a look-up table.
13. The method of claim 12 , wherein said look-up table is indexed based on a transmitted signal power parameter.
14. The method of claim 10 , wherein said generating said model is based on control information received from a transmitter from which said OFDM symbol originated.
15. The method of claim 14 , wherein said control information comprises an identification of a type of nonlinear distortion model best suited for use with said OFDM symbol.
16. The method of claim 14 , wherein said control information comprises initial values for parameters of said model of said nonlinear distortion model.
17. The method of claim 14 , comprising receiving said control information during handshaking with said transmitter.
18. The method of claim 14 , comprising receiving said control information in a preamble of said OFDM symbol.
19. A receiver comprising: an analog front end circuit operable to receive a nonlinearly distorted orthogonal frequency division multiplexed (OFDM) symbol that is a result of a plurality of symbols transmitted on a plurality of subcarriers; nonlinear distortion modeling circuitry operable to generate a model of nonlinear distortion introduced to said OFDM symbol by a transmitter, wherein: a result of said nonlinear distortion is inter-subcarrier interference in said received OFDM symbol; said model of said nonlinear distortion is stored in memory of said receiver as a look-up table; and said look-up table is indexed based on a transmitted signal power parameter; and circuitry operable to: iteratively calculate metrics based on said received OFDM symbol and said model of nonlinear distortion; and determine values of said symbols based on said metrics.
20. The receiver of claim 19 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a mathematical and/or logical expression.
21. The receiver of claim 19 , wherein said generation of said model is based on control information received from a transmitter from which said OFDM symbol originated.
22. The receiver of claim 21 , wherein said control information comprises an identification of a type of nonlinear distortion model best suited for use with said OFDM symbol.
23. The receiver of claim 21 , wherein said control information comprises initial values for parameters of said model of said nonlinear distortion model.
24. The receiver of claim 21 , wherein said control information is received during handshaking with said transmitter.
25. The receiver of claim 21 , wherein said control information is received in a preamble of said OFDM symbol.
26. A method comprising: in a receiver: receiving, by an analog front end circuit, a nonlinearly distorted orthogonal frequency division multiplexed (OFDM) symbol that is a result of a plurality of symbols transmitted on a plurality of subcarriers; generating, by nonlinear distortion modeling circuitry, a model of nonlinear distortion introduced to said OFDM symbol by a transmitter, wherein: a result of said nonlinear distortion is inter-subcarrier interference in said received OFDM symbol; said model of said nonlinear distortion is stored in memory of said receiver as a look-up table; and said look-up table is indexed based on a transmitted signal power parameter; and iteratively calculating, by circuitry of said receiver, metrics based on said received OFDM symbol and said model of nonlinear distortion; and determining, by circuitry of said receiver, values of said symbols based on said metrics.
27. The method of claim 26 , wherein said model of said nonlinear distortion is stored in memory of said receiver as a mathematical and/or logical expression.
28. The method of claim 26 , wherein said generating said model is based on control information received from a transmitter from which said OFDM symbol originated.
29. The method of claim 28 , wherein said control information comprises an identification of a type of nonlinear distortion model best suited for use with said OFDM symbol.
30. The method of claim 28 , wherein said control information comprises initial values for parameters of said model of said nonlinear distortion model.
31. The method of claim 28 , comprising receiving said control information during handshaking with said transmitter.
32. The method of claim 28 , comprising receiving said control information in a preamble of said OFDM symbol.
Unknown
February 23, 2016
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