Advanced signal processors for interference cancellation in baseband receivers
First Claim
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1. A method for cancelling interference from a received baseband signal, the method comprising:
- generating at least one composite interference vector (CIV) by combining estimates from interfering subchannels, wherein the estimates are derived from at least one of a Rake receiver, an equalizer, a receiver employing receive diversity, a receiver employing transmit diversity combining, or a receiver employing space-time decoding;
generating a soft-projection matrix corresponding to the at least one CIV; and
operating on the received baseband signal using the soft-projection matrix to output an interference-cancelled signal.
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Abstract
An interference canceller comprises a composite interference vector (CIV) generator configured to produce a CIV by combining soft and/or hard estimates of interference, an interference-cancelling operator configured for generating a soft projection operator, and a soft-projection canceller configured for performing a soft projection of the received baseband signal to output an interference-cancelled signal. Weights used in the soft-projection operator are selected to maximize a post-processing SINR.
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Citations
17 Claims
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1. A method for cancelling interference from a received baseband signal, the method comprising:
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generating at least one composite interference vector (CIV) by combining estimates from interfering subchannels, wherein the estimates are derived from at least one of a Rake receiver, an equalizer, a receiver employing receive diversity, a receiver employing transmit diversity combining, or a receiver employing space-time decoding; generating a soft-projection matrix corresponding to the at least one CIV; and operating on the received baseband signal using the soft-projection matrix to output an interference-cancelled signal. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for cancelling interference from a received baseband signal, comprising:
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at least one memory storing software; and at least one processor capable of executing the software to perform operations comprising; generating at least one composite interference vector (CIV) by combining estimates from interfering subchannels, wherein the estimates are derived from at least one of a Rake receiver, an equalizer, a receiver employing receive diversity, a receiver employing transmit diversity combining, or a receiver employing space-time decoding; generating a soft-projection matrix corresponding to the at least one CIV; and operating on the received baseband signal using the soft-projection matrix to output an interference-cancelled signal. - View Dependent Claims (7, 8, 9, 10, 11)
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12. At least one non-transitory computer-readable medium including software that, when executed by at least one processor, causes operations comprising:
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generating at least one composite interference vector (CIV) by combining estimates from interfering subchannels, wherein the estimates are derived from at least one of a Rake receiver, an equalizer, a receiver employing receive diversity, a receiver employing transmit diversity combining, or a receiver employing space-time decoding; generating a soft-projection matrix corresponding to the at least one CIV; and operating on a received baseband signal using the soft-projection matrix to output an interference-cancelled signal. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification