Low complexity, iterative approach to active interference cancellation
First Claim
1. A method of generating a notch in an Orthogonal Frequency Division Multiplexing (OFDM) frequency spectrum, comprising:
- determining a first active interference cancellation (AIC) tone;
comparing, using a processing component, the first AIC tone with an amplitude limit;
in the event that the first AIC tone exceeds the amplitude limit, constraining the first AIC tone, and determining a second AIC tone based at least in part on the first AIC tone;
wherein the first AIC tone is determined based at least in part on a plurality of peak values of a transform function.
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Accused Products
Abstract
Generating a notch in an Orthogonal Frequency Division Multiplexing (OFDM) frequency spectrum includes determining a first active interference cancellation (AIC) tone, comparing the first AIC tone with an amplitude limit, in the event that the first AIC tone exceeds the amplitude limit, constraining the first AIC tone, and determining a second AIC tone based at least in part on the first AIC tone. An Active Interference Cancellation (AIC) tone generator includes an interface configured to receive a plurality of tones, a processing component coupled to the interface, configured to determine a first AIC tone, compare the first AIC tone with an amplitude limit, and in the event that the first AIC tone exceeds the amplitude limit, constrain the first AIC tone, and determine a second AIC tone based at least in part on the first AIC tone.
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Citations
17 Claims
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1. A method of generating a notch in an Orthogonal Frequency Division Multiplexing (OFDM) frequency spectrum, comprising:
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determining a first active interference cancellation (AIC) tone; comparing, using a processing component, the first AIC tone with an amplitude limit; in the event that the first AIC tone exceeds the amplitude limit, constraining the first AIC tone, and determining a second AIC tone based at least in part on the first AIC tone; wherein the first AIC tone is determined based at least in part on a plurality of peak values of a transform function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An Active Interference Cancellation (AIC) tone generator, comprising:
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an interface configured to receive a plurality of tones; a processing component coupled to the interface, configured to; determine a first AIC tone; compare the first AIC tone with an amplitude limit; and in the event that the first AIC tone exceeds the amplitude limit, constrain the first AIC tone, and determine a second AIC tone based at least in part on the first AIC tone; wherein the first AIC tone is determined based at least in part on a plurality of peak values of a transform function. - View Dependent Claims (11, 12, 13)
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14. An Orthogonal Frequency Division Multiplexing (OFDM) transmitter comprising:
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a tone controller configured to turn off one or more data tones in a frequency band; an active interference cancellation (AIC) tone generator coupled to the tone controller, configured to; determine a first AIC tone; compare the first AIC tone with an amplitude limit; and in the event that the first AIC tone exceeds the amplitude limit, constrain the first AIC tone, and determine a second AIC tone based at least in part on the first AIC tone; wherein the first AIC tone is determined based at least in part on a plurality of peak values of a transform function. - View Dependent Claims (15, 16, 17)
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Specification