Apparatus and method for interference cancellation in receiver of communication system
First Claim
1. An apparatus for interference cancellation used in a receiver of a transceiver of a communication device, the apparatus comprising:
- a digital cancellation signal generator for generating a digital cancellation signal comprising a first digital signal and a second digital signal, wherein the digital cancellation signal represents an interference signal within a received signal received by the receiver;
a first canceller, coupled to the digital cancellation signal generator, for performing an analog cancellation on the received signal in an analog domain according to the first digital signal to output a first canceled received signal, wherein the first canceller performs the analog cancellation in a discrete-time domain to remove a plurality of high frequency components; and
a second canceller, coupled to the digital cancellation signal generator and the first canceller, for performing a digital cancellation on the first canceled received signal in a digital domain according to the second digital signal to output a digital output signal.
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Abstract
An apparatus and method for interference cancellation is provided to cancel the interference such as echo and cross-talk received by a receiver of a communication system. The apparatus includes a digital cancellation signal generator, a first canceller, and a second canceller. The digital cancellation signal generator can generate a digital cancellation signal, which includes a first and a second portion and represents an interference signal within a received signal. The first canceller can perform an analog cancellation on the received signal to output a partially-interference-canceled received signal according to the first portion of the digital cancellation signal. The second canceller can perform a digital cancellation on the partially-interference-canceled received signal according to the second portion of the digital cancellation signal.
19 Citations
23 Claims
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1. An apparatus for interference cancellation used in a receiver of a transceiver of a communication device, the apparatus comprising:
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a digital cancellation signal generator for generating a digital cancellation signal comprising a first digital signal and a second digital signal, wherein the digital cancellation signal represents an interference signal within a received signal received by the receiver; a first canceller, coupled to the digital cancellation signal generator, for performing an analog cancellation on the received signal in an analog domain according to the first digital signal to output a first canceled received signal, wherein the first canceller performs the analog cancellation in a discrete-time domain to remove a plurality of high frequency components; and a second canceller, coupled to the digital cancellation signal generator and the first canceller, for performing a digital cancellation on the first canceled received signal in a digital domain according to the second digital signal to output a digital output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for interference cancellation used in a receiver of a communication system, the method comprising steps of:
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receiving a received signal using a hybrid circuit; in the receiver, generating a digital cancellation signal comprising a first digital signal and a second digital signal, wherein the digital cancellation signal represents an interference signal within the received signal; in the receiver, converting a first digital signal into a first analog signal comprising at least one of a plurality of discrete-time voltage values and a plurality of discrete-time current values, wherein the converting is performed in a discrete-time domain and to remove a plurality of high frequency components; in the receiver, performing an analog cancellation on the received signal in an analog domain according to the first analog signal to output an analog partially-interference-canceled signal; in the receiver, converting the analog partially-interference-canceled signal into a digital partially-interference-canceled signal; and in the receiver, performing a digital cancellation on the digital partially-interference-canceled signal according to the second digital signal to output an digital output signal. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification