Method and system for signal reconstruction from spatially and temporally correlated received samples
First Claim
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1. A method for computing a reconstructed desired user'"'"'s signal contribution from a received signal, comprising:
- estimating spatial correlation of a plurality of received samples of the received signal;
estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas;
calculating the spatial correlation of a desired user'"'"'s signal based on the estimated spatial correlation of the plurality of channel coefficients of the received signal; and
computing the reconstructed desired user'"'"'s signal contribution based on the calculated spatial correlation of the desired user'"'"'s signal and the estimated spatial correlation of the plurality of received samples.
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Abstract
A method and system for reconstructing a user'"'"'s received signal based on knowledge of the user'"'"'s transmitted signal to yield efficient interference cancellation when there is spatial and/or temporal correlation in the received signal. The invention may be applied to the cancellation of pilot, decoded data and overhead signals. The method may involve a linear combination of the received samples across time, e.g., at a per-chip or sub-chip resolution, and across antennas, and build upon previous work in that the tap weights need not be the sole functions of the de-spreader outputs in the RAKE receiver.
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Citations
42 Claims
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1. A method for computing a reconstructed desired user'"'"'s signal contribution from a received signal, comprising:
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estimating spatial correlation of a plurality of received samples of the received signal; estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas; calculating the spatial correlation of a desired user'"'"'s signal based on the estimated spatial correlation of the plurality of channel coefficients of the received signal; and computing the reconstructed desired user'"'"'s signal contribution based on the calculated spatial correlation of the desired user'"'"'s signal and the estimated spatial correlation of the plurality of received samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for computing a reconstructed desired user'"'"'s signal contribution from a received signal, comprising:
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means for estimating spatial correlation of a plurality of received samples of the received signal; means for estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas; means for calculating the spatial correlation of a desired user'"'"'s signal based on estimated spatial correlation of the plurality of channel coefficients of the received signal; and means for computing the reconstructed desired user'"'"'s signal contribution based on calculated spatial correlation of the desired user'"'"'s signal and estimated spatial correlation of the plurality of received samples. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An interference cancellation (IC) apparatus comprising:
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a receiver configured to receive a received signal; and a module configured to perform interference cancellation and to compute a reconstructed desired user'"'"'s signal contribution from spatially and temporally correlated received samples of the received signal and spatially and temporally correlated channel coefficients of the received signal, the channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas; wherein the module is further configured to calculate spatial and temporal correlation of a desired user'"'"'s signal based on the spatially and temporally correlated channel coefficients, and further wherein computation of the reconstructed desired user'"'"'s signal contribution is based on calculated spatial and temporal correlation of the desired user'"'"'s signal and the spatially and temporally correlated received samples. - View Dependent Claims (40, 41)
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42. A non-transitory computer readable medium embodying a method of computing a reconstructed desired user'"'"'s signal contribution from a received signal, the method comprising:
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estimating spatial correlation of a plurality of received samples of the received signal; estimating spatial correlation of a plurality of channel coefficients of the received signal, the plurality of channel coefficients comprising signal amplitudes of various paths, including delay, received at multiple antennas; calculating the spatial correlation of a desired user'"'"'s signal based on the estimated spatial correlation of the plurality of channel coefficients of the received signal; and computing the reconstructed desired user'"'"'s signal contribution based on the calculated spatial correlation of the desired user'"'"'s signal and the estimated spatial correlation of the plurality of received samples.
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Specification