Variable interference cancellation technology for CDMA systems
First Claim
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1. An apparatus configured to remove interference from a received baseband signal in a CDMA system, comprising:
- a composite interference vector (CIV) generator configured to produce at least one CIV by combining 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.
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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
35 Claims
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1. An apparatus configured to remove interference from a received baseband signal in a CDMA system, comprising:
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a composite interference vector (CIV) generator configured to produce at least one CIV by combining 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for cancelling interference from a received baseband signal in a CDMA system, comprising:
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providing for generating at least one composite interference vector (CIV) by combining estimates from interfering subchannels, providing for generating a soft-projection operator, and providing for performing a soft projection of the received baseband signal to output an interference-cancelled signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An interference-cancellation system configured for removing interference from a received baseband signal in a CDMA system, comprising:
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a means for generating at least one composite interference vector (CIV) by combining estimates of interference, a means for generating a soft-projection operator, and a means for performing a soft projection of the received baseband signal to output an interference-cancelled signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification