Interference cancellation for non-orthogonal channel sets
First Claim
1. A method comprising:
- estimating (610) a first PSC channel set scrambled by a first primary scrambling code;
cancelling (620) the estimated first PSC channel set from a received signal;
estimating (630) a first SSC channel set scrambled by a first secondary scrambling code, the first SSC channel set being non-orthogonal to the first PSC channel set, the first PSC and SSC channel sets being transmitted from a single station, wherein the estimating of the first SSC channel set is done on at least one of the channels in the SSC channel set that is transmitted with no transmit power; and
cancelling (640) the estimated first SSC channel set.
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Accused Products
Abstract
Techniques for interference cancellation in a CDMA system. In an exemplary embodiment, a channel set scrambled using a secondary scrambling code (SSC) is estimated and cancelled along with a channel set scrambled using a primary scrambling code (SSC). The estimation and cancellation of the SSC channel set may proceed in series with the estimation and cancellation of the PSC channel set. Alternatively, the estimation of the SSC channel set may proceed in parallel with the estimation of the PSC channel set, and the cancellations of the PSC and SSC channel sets may be simultaneously performed. Multiple iterations of such estimation and cancellation may be performed in a successive interference cancellation (SIC) scheme.
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Citations
28 Claims
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1. A method comprising:
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estimating (610) a first PSC channel set scrambled by a first primary scrambling code; cancelling (620) the estimated first PSC channel set from a received signal; estimating (630) a first SSC channel set scrambled by a first secondary scrambling code, the first SSC channel set being non-orthogonal to the first PSC channel set, the first PSC and SSC channel sets being transmitted from a single station, wherein the estimating of the first SSC channel set is done on at least one of the channels in the SSC channel set that is transmitted with no transmit power; and cancelling (640) the estimated first SSC channel set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus comprising:
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a first PSC estimation unit (481.1) configured to estimate a first PSC channel set scrambled by a first primary scrambling code; a first PSC cancellation unit (482.1) configured to cancel the estimated first PSC channel set from a received signal; a first SSC estimation unit (481.1.1) configured to estimate a first SSC channel set scrambled by a first secondary scrambling code, the first SSC channel set being non-orthogonal to the first PSC channel set, the first PSC and SSC channel sets being transmitted from a single station, wherein the estimate of the first SSC channel set is done on at least one of the channels in the SSC channel set that is transmitted with no transmit power; and a first SSC cancellation unit (482.1.1) configured to cancel the estimated first SSC channel set. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus comprising:
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means (481.1) for estimating a first PSC channel set scrambled by a first primary scrambling code; means (482.1) for cancelling the estimated first PSC channel set from a received signal; means (481.1.1) for estimating a first SSC channel set scrambled by a first secondary scrambling code, wherein the estimating of the first SSC channel set is done on at least one of the channels in the SSC channel set that is transmitted with no transmit power, the first SSC channel set being non-orthogonal to the first PSC channel set, the first PSC and SSC channel sets being transmitted from a single station; and means (482.1.1) for cancelling the estimated first SSC channel set. - View Dependent Claims (26)
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27. A non-transitory computer-readable storage medium storing instructions for causing a computer to:
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estimate (610) a first PSC channel set scrambled by a first primary scrambling code; cancel (620) the estimated first PSC channel set from a received signal; estimate (630) a first SSC channel set scrambled by a first secondary scrambling code, the first SSC channel set being non-orthogonal to the first PSC channel set, the first PSC and SSC channel sets being transmitted from a single station, wherein the estimate of the first SSC channel set is done on at least one of the channels in the SSC channel set that is transmitted with no transmit power; and cancel (640) the estimated first SSC channel set. - View Dependent Claims (28)
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Specification