Systems approach to interference cancellation
First Claim
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1. An interference cancellation system, comprising:
- a receiver coupled to a single receiving antenna or array, the receiver being configured to receive a first signal;
an interference estimation module, wherein said interference estimation module is configured to receive said first signal from said receiver, to estimate and to output an interference component of said first signal; and
,an optical interference cancellation module in communication with said interference estimation module, wherein said optical interference cancellation module receives said first signal and said estimated interference component, and wherein said optical interference cancellation module is configured to optically cancel at least a portion of said estimated interference component from said first signal.
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Abstract
Disclosed is a system and method of combining optical interference cancellation with other methods of interference cancellation, including electronic cancellation, digital filtering, and beam steering algorithms, to remove co-located interference, remote interference of an unknown origin, and multipath interference components created by reflections of signals both known and unknown.
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Citations
47 Claims
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1. An interference cancellation system, comprising:
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a receiver coupled to a single receiving antenna or array, the receiver being configured to receive a first signal; an interference estimation module, wherein said interference estimation module is configured to receive said first signal from said receiver, to estimate and to output an interference component of said first signal; and
,an optical interference cancellation module in communication with said interference estimation module, wherein said optical interference cancellation module receives said first signal and said estimated interference component, and wherein said optical interference cancellation module is configured to optically cancel at least a portion of said estimated interference component from said first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A multi-unit interference cancellation system, comprising:
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a first receiver coupled to a single receiving antenna or array, the first receiver being configured to receive a first incoming signal; a first transmitter, in close proximity to said first receiver, said first transmitter capable of transmitting a first outgoing signal; a second receiver capable of receiving a second incoming signal; a second transmitter, in close proximity to said second receiver, said second transmitter capable of transmitting a second outgoing signal; a first interference cancellation system comprising a first optical interference cancellation module, wherein said first incoming signal includes one or more of a portion of said second outgoing signal and an interference component attributable to the transmission of said first outgoing signal, and wherein said first optical interference cancellation module is configured to receive said first incoming signal and said first outgoing signal and to optically cancel from said first incoming signal at least a portion of said interference component attributable to the transmission of said first outgoing signal; and
,a second interference cancellation system comprising a first electronic interference cancellation module, wherein said second incoming signal includes one or more of a portion of said first outgoing signal and an interference component attributable to the transmission of said second outgoing signal, and wherein said first electronic interference cancellation module is configured to receive said second incoming signal and said second outgoing signal and to electronically cancel from said second incoming signal at least a portion of said interference component attributable to the transmission of said second outgoing signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An interference cancellation system, comprising:
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a first electro-optic modulator for receiving a first electrical signal; and a multipath component compensation system comprising an optical coupler and one or more branches connected to said coupler, each said branch comprising;
(a) an arrayed waveguide grating weighting network;
(b) an electro-optic modulator biased for parallel counter-phase modulation with said first electro-optic modulator;
(c) at least one optical attenuator; and
, (d) at least one optical delay;
wherein said multipath component compensation system is configured to receive a second electrical signal combined with said first electrical signal, and to estimate multipath components of said second electrical signal; and
,an optical coupler connected to said first electro-optic modulator and said multipath component compensation system.
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38. An interference cancellation system, comprising:
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a phased array of receiving antennas, each antenna capable of receiving a first signal; a transmitter, in close proximity to said phased array of receiving antennas, said transmitter capable of transmitting a second signal; an optical interference cancellation module, wherein said optical interference cancellation module is configured to receive said first signal and said second signal, and to optically cancel from said first signal at least a portion of an interference component attributable to the transmission of said second signal; a beam steering module, wherein said beam steering module is configured to receive said first signal, to calculate an angle of arrival of said first signal at said phased array, and to remove any signal components included in said first signal that arrived at said phased array from an angle of arrival associated with one or more sources of interference; and
,an adaptive processing module, wherein said adaptive processing module is configured to receive said first signal, to estimate said first signal in the presence of co-located and remotely located interference, and to remove said co-located and remotely located interference from said first signal.
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39. An interference cancellation system, comprising:
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a receiver coupled to a single receiving antenna or array, the receiver being configured to receive a first signal; means for estimating an interference component of said first signal; and means for optically canceling said interference component of said first signal. - View Dependent Claims (40, 41, 42, 43)
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44. A method of cancelling interference, comprising:
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receiving first signal at a receiver coupled to a single receiving antenna or array; estimating an interference component of said first signal using an interference estimation module; and optically cancelling said interference component of said first signal using an optical interference cancellation system. - View Dependent Claims (45, 46, 47)
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Specification