METHOD, APPARATUS AND SYSTEM FOR IMPLEMENTING MULTI-USER VIRTUAL MULTIPLE-INPUT MULTIPLE-OUTPUT
First Claim
1. In a wireless communication system including a base station and a plurality of wireless transmit/receive units (WTRUs), the base station including a plurality of antennas, and at least one of said WTRUs including at least two antennas wherein the number of antennas of the base station is not less than the number of antennas of any of the WTRUs, a method for implementing multi-user virtual multiple-input multiple-output (MIMO), the method comprising:
- the base station generating a channel matrix for the WTRUs; and
the base station processing received signals from the WTRUs using the channel matrix.
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Abstract
A method and system for implementing multi-user virtual multiple-input multiple-output (MIMO) techniques for wireless transmit/receive units (WTRUs) having one or more antennas are disclosed. The system includes a base station and at least one WTRU having at least two antennas. The number of antennas of the base station is not less than the number of antennas of any of the WTRUs. The base station generates a channel matrix for the WTRUs and processes received signals from the WTRUs based on a measurement of the channel matrix. The WTRUs may perform transmit precoding or eigen-beamforming using the channel matrix information. The WTRUs may also perform transmit diversity.
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Citations
28 Claims
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1. In a wireless communication system including a base station and a plurality of wireless transmit/receive units (WTRUs), the base station including a plurality of antennas, and at least one of said WTRUs including at least two antennas wherein the number of antennas of the base station is not less than the number of antennas of any of the WTRUs, a method for implementing multi-user virtual multiple-input multiple-output (MIMO), the method comprising:
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the base station generating a channel matrix for the WTRUs; and the base station processing received signals from the WTRUs using the channel matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communication system for implementing multi-user virtual multiple-input multiple-output (MIMO), the system comprising:
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a plurality of wireless transmit/receive units (WTRUs), at least one WTRU having at least two antennas; and a base station comprising; a plurality of antennas, the number of the base station antennas being not less than the number of antennas of any of the WTRUs; a channel estimator for generating a channel matrix for the WTRUs; and a receiver for processing signals transmitted from the WTRUs using the channel matrix. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A base station for implementing multi-user virtual multiple-input multiple-output (MIMO) for a plurality of wireless transmit/receive units (WTRUs), at least one WTRU having at least two antennas, the base station comprising:
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a plurality of antennas, the number of the base station antennas being not less than the number of antennas of any of the WTRUs; a channel estimator for generating a channel matrix for the WTRUs; and a receiver for processing signals from the WTRUs using the channel matrix. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification