Base station system including parallel interference cancellation processor
First Claim
1. A base station system, comprising:
- a controller generating acquisition data for each user signal to be processed, and generating control information for said user signals to be processed, said acquisition data including identity information identifying a user signal to be processed and timing information for said user signal to be processed, said control information including said acquisition data for at least one of said user signals to be processed; and
a plurality of signal processors, each signal processor acquiring a user signal from input signals based on said acquisition data received thereby, and estimating symbols in said acquired user signal; and
a cancellation processor receiving a plurality of received signals and performing a cancellation operation on selected received signals based on said control information to generate said input signals.
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Accused Products
Abstract
The base station system includes a cancellation processor connected to a plurality of conventional signal processors. Under the control of a controller, the signal processors acquire user signals in signals received by the base station antennas. The controller controls the cancellation processor to perform cancellation operations with respect to the acquired user signals. The cancellation processor includes first-nth filter stages. Each filter stage operates in the same manner. A filter stage obtains, in parallel, the acquired user signals from signals supplied thereto by estimating symbols in the acquired user signals under the control of the controller. The cancellation processor also includes a cancellation stage associated with each filter stage. Each cancellation stage cancels, in parallel, the obtained user signals output from the associated filter stage from the signals received by the base station antennas. The resulting residual signals output from a cancellation stage are supplied to the next filter stage, and the signals supplied to the first filter stage are the signals received by the base station antennas. A cancellation stage cancels the obtained user signals received thereby from the received signals at a substantially same time with respect to the received signals.
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Citations
33 Claims
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1. A base station system, comprising:
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a controller generating acquisition data for each user signal to be processed, and generating control information for said user signals to be processed, said acquisition data including identity information identifying a user signal to be processed and timing information for said user signal to be processed, said control information including said acquisition data for at least one of said user signals to be processed; and a plurality of signal processors, each signal processor acquiring a user signal from input signals based on said acquisition data received thereby, and estimating symbols in said acquired user signal; and a cancellation processor receiving a plurality of received signals and performing a cancellation operation on selected received signals based on said control information to generate said input signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A cancellation processor, comprising:
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N filter stages, where N is an integer greater than 1, filtering signals supplied thereto to obtain, in parallel, user signals identified in control information received thereby, said control information including acquisition data for at least one user signal, each said acquisition data including identity information identifying a user signal to be processed and timing information for said user signal to be processed; a cancellation stage associated with each one of said N filter stages, for canceling said obtained user signals from said received signals to generate residual signals; a first filter stage of said N filter stages being supplied said received signals, and successive filter stages of said N filter stages receiving said residual signal output from said cancellation stage associated with a previous filter stage of said N filter stages; each of said N filter stages including first-kth filter blocks, each said acquisition data in said control information being received by one of said first-kth filter blocks, and each of said first-kth filter blocks filtering said supplied signals to generate, as said obtained user signal, a user signal identified by said acquisition data received thereby; and each cancellation stage including first-kth delay blocks and first-kth cancellers, said first delay block delaying said received signals by a first predetermined time, said second-kth delay blocks delaying output of said first-(k-1)th cancellers by said first predetermined time, said first-kth cancellers canceling said obtained signals output by said first-kth filter blocks from output of said first-kth delay blocks, respectively. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification