ADAPTIVE MULTI-USER MIMO NON-COOPERATIVE THRESHOLD-BASED WIRELESS COMMUNICATION SYSTEM USING LIMITED CHANNEL FEEDBACK
First Claim
1. A wireless communication system, comprising:
- a plurality of users, each of the plurality of users having a channel feedback component that generates and transmits channel state information; and
a base station that transmits data on a downlink, the base station comprising a plurality of transmit antennas and a precoding component that receives the channel state information from the plurality of users and coordinates multi-user transmission of the data from the plurality of transmit antennas to at least two users based on the channel state information.
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Abstract
A system and methodology for efficient multi-user transmission in a wireless communication with limited feedback are provided. A non-cooperative feedback-based multi-user transmission scheme is described, wherein users in a wireless communication system may independently communicate selected channel information feedback to the base station. The base station may then choose suitable precoding weights based on the received channel information feedback. An adaptive threshold-based feedback approach is also described for multi-user transmission, wherein the quality of feedback for each user can be quantified by a special threshold by the system prior to engaging in multi-user communication.
147 Citations
20 Claims
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1. A wireless communication system, comprising:
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a plurality of users, each of the plurality of users having a channel feedback component that generates and transmits channel state information; and a base station that transmits data on a downlink, the base station comprising a plurality of transmit antennas and a precoding component that receives the channel state information from the plurality of users and coordinates multi-user transmission of the data from the plurality of transmit antennas to at least two users based on the channel state information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of non-cooperative multi-user communication in a wireless communication system, comprising:
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receiving channel information feedback from one or more users; selecting one or more precoding weights for at least two users from which channel information feedback is received based at least in part on the channel information feedback received from each respective user; and transmitting data to the at least two users from which channel information feedback is received simultaneously at least in part by applying the one or more precoding weights selected for each user to which data is to be transmitted to a portion of the data for transmission to each respective user. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A system that facilitates non-cooperative multi-user wireless communication, comprising:
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means for receiving channel feedback from one or more users; means for beamforming one or more signals containing data to be transmitted to some or all of the one or more users based at least in part on the channel feedback received from the one or more users; and means for transmitting the beamformed signals to some or all of the one or more users simultaneously. - View Dependent Claims (20)
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Specification