Method and apparatus for interference cancellation
First Claim
1. An interference canceller between a transmit chain and a receive chain of a transceiver, the transceiver comprising a diplexer between the transmit chain and the receive chain, the interference canceller comprising a transmit chain tap, a receive chain coupler for coupling an interference compensation signal into the receive chain, and an interference signal processing path between the transmit chain tap and the receive chain coupler, the interference signal processing path comprising a filter having filtering characteristics similar or corresponding to the filtering characteristic of a receive portion of said diplexer.
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Accused Products
Abstract
An interference canceller between a transmit chain and a receive chain of a transceiver is proposed to complement the action of a diplexer, or duplex filter, that is part of the transceiver. The interference canceller comprises a transmit chain tap, a receive chain coupler for coupling an interference compensation signal into the receive chain, and an interference signal processing path between the transmit chain tap and the receive chain coupler. The interference signal processing path comprises a filter having filtering characteristics similar or corresponding to the filtering characteristic of a receive portion of said diplexer. A corresponding method for interference cancellation is also proposed. Computer-program products for the manufacture of the interference canceller and the execution of the method are also proposed.
51 Citations
18 Claims
- 1. An interference canceller between a transmit chain and a receive chain of a transceiver, the transceiver comprising a diplexer between the transmit chain and the receive chain, the interference canceller comprising a transmit chain tap, a receive chain coupler for coupling an interference compensation signal into the receive chain, and an interference signal processing path between the transmit chain tap and the receive chain coupler, the interference signal processing path comprising a filter having filtering characteristics similar or corresponding to the filtering characteristic of a receive portion of said diplexer.
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13. A method for interference cancellation between a transmit chain and a receive chain of a transceiver, comprising:
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tapping a signal at the transmit chain to obtain a tapped signal, processing the tapped signal within an interference processing path between the transmit chain and the receive chain to obtain an interference compensation signal, wherein processing comprises filtering the tapped signal in a similar or corresponding manner to a filtering action of a transmit-to-receive interference path of the transceiver, coupling the interference compensation signal with the receive chain. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification