Apparatus and method for implementing SDMA in multi-user multi-antenna system
First Claim
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1. A method for implementing Spatial Division Multiple Access (SDMA) in a multi-user multi-antenna system, comprising:
- selecting SDMA users from among total users according to channel state information of the total users; and
determining the number of transmission streams to be allocated to each of the SDMA users by a tree search method,wherein the determination comprises selecting a tree search method for determining the number of transmission streams for each SDMA user, and determining the number of transmission streams for each SDMA user by the selected tree search method.
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Abstract
An apparatus and method for implementing SDMA in a multi-user multi-antenna system are provided, in which SDMA users are selected from among total users according to channel state information of the total users, and the number of transmission streams to be allocated to each of the SDMA users is determined by a tree search method.
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Citations
24 Claims
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1. A method for implementing Spatial Division Multiple Access (SDMA) in a multi-user multi-antenna system, comprising:
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selecting SDMA users from among total users according to channel state information of the total users; and determining the number of transmission streams to be allocated to each of the SDMA users by a tree search method, wherein the determination comprises selecting a tree search method for determining the number of transmission streams for each SDMA user, and determining the number of transmission streams for each SDMA user by the selected tree search method. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transmitter in a multi-user multi-antenna system, comprising:
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a user selector for selecting Spatial Division Multiple Access (SDMA) users from among total users according to channel state information of the total users; a stream decider for determining the number of transmission streams to be allocated to each of the SDMA users by a tree search method; and a controller for selecting a tree search method for determining the number of transmission streams for each SDMA user by comparing the number of SDMA users with a predetermined threshold, wherein the stream decider determines the number of transmission streams for each SDMA user by a first tree search method, if the number of the SDMA users is equal to or less than the predetermined threshold and determines the number of transmission streams for each SDMA user by a second tree search method, if the number of SDMA users is larger than the predetermined threshold. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification