INTERFERENCE CANCELLATION WITH A TIME-SLICED ARCHITECTURE
First Claim
1. A method of interference cancellation, comprising:
- receiving a multi-user baseband antenna signal at a receiver, the multi-user baseband antenna signal including physical channel transmissions;
demodulating the physical data channel transmissions;
determining a user symbol energy value for each of the multiple users based on the demodulated transmissions; and
removing a reconstructed signal for each user with a determined symbol energy value exceeding a threshold, from the multi-user baseband antenna signal to form an interference cancelled baseband antenna signal.
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Accused Products
Abstract
Example embodiments include methods of interference cancellation at NodeB receivers of baseband antenna signals including physical channels. The methods include canceling interference from a received baseband antenna signal by removing a reconstructed baseband signal from the processed received baseband antenna signal. The processed reconstructed baseband signal includes users whose physical data channel signals were successfully decoded. Methods also include removing interference from a received baseband signal to form an interference cancelled baseband signal that will be processed by the receiver. The interference cancelled baseband signal is the received baseband antenna signal minus users'"'"' signal interference contributions whose demodulated physical data channel signals have a determined user symbol energy value that exceeds a threshold. Methods further include removing interference from a user'"'"'s signal to be error corrected. The interference is symbol interference from an earlier successfully decoded user'"'"'s symbols. The user symbol interference is determined by cross correlations.
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Citations
5 Claims
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1. A method of interference cancellation, comprising:
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receiving a multi-user baseband antenna signal at a receiver, the multi-user baseband antenna signal including physical channel transmissions; demodulating the physical data channel transmissions; determining a user symbol energy value for each of the multiple users based on the demodulated transmissions; and removing a reconstructed signal for each user with a determined symbol energy value exceeding a threshold, from the multi-user baseband antenna signal to form an interference cancelled baseband antenna signal. - View Dependent Claims (2, 3)
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4. The method of 1, further comprising:
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processing at the receiver for each user of the multi-user baseband antenna signal, wherein the processing input for each user is either, (a) the interference cancelled baseband antenna signal, or (b) a combination of the interference cancelled baseband antenna signal and the previously removed reconstructed signal for this user, wherein for each user whose determined symbol energy value did not exceed the threshold, (a) is input, and for each user whose determined symbol energy value exceeded the threshold, (b) is input. - View Dependent Claims (5)
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Specification