MIMO SYSTEM WITH MULTIPLE SPATIAL MULTIPLEXING MODES
First Claim
1. A method of transmitting data in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
- receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode;
coding and modulating a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and
using the spatial multiplexing mode, processing the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas.
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Accused Products
Abstract
A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas. For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.
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Citations
44 Claims
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1. A method of transmitting data in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; coding and modulating a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and using the spatial multiplexing mode, processing the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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a controller operative to receive information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein at least one of the spatial multiplexing modes is a non-steered spatial multiplexing mode; a transmit data processor operative to code and modulate a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and a transmit spatial processor operative to, using the spatial multiplexing mode, process the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus of transmitting data in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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means for receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; means for coding and modulating a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and means for processing, using the spatial multiplexing mode, the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A computer-program product for transmitting data in a wireless multiple-input multiple-output (MIMO) communication system, comprising a memory unit having a set of instructions stored thereon, the set of instructions being executable by one or more processors and the set of instructions comprising:
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instructions for receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; instructions for coding and modulating a plurality of data streams in accordance with a plurality of rates to obtain a plurality of data symbol streams; and instructions for processing, using the spatial multiplexing mode, the plurality of data symbol streams to obtain a plurality of transmit symbol streams for transmission from a plurality of antennas. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method of receiving data in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system; using the spatial multiplexing mode, processing at least one received symbol stream to obtain at least one recovered data symbol stream, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; and demodulating and decoding the at least one recovered data symbol stream in accordance with at least one rate to obtain at least one decoded data stream. - View Dependent Claims (26, 27, 28, 29)
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30. An apparatus in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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a controller operative to receive information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system, wherein at least one of the spatial multiplexing modes is a non-steered spatial multiplexing mode; a receive spatial processor operative to, using the spatial multiplexing mode, process at least one received symbol stream to obtain at least one recovered data symbol stream; and a receive data processor operative to demodulate and decode the at least one recovered data symbol stream in accordance with at least one rate to obtain at least one decoded data stream. - View Dependent Claims (31, 32, 33, 34)
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35. An apparatus of receiving data in a wireless multiple-input multiple-output (MIMO) communication system, comprising:
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means for receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system; means for processing, using the spatial multiplexing mode, at least one received symbol stream to obtain at least one recovered data symbol stream, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; and means for demodulating and decoding the at least one recovered data symbol stream in accordance with at least one rate to obtain at least one decoded data stream. - View Dependent Claims (36, 37, 38, 39)
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40. A computer-program product for receiving data in a wireless multiple-input multiple-output (MIMO) communication system comprising a memory unit having a set of instructions stored thereon, the set of instructions being executable by one or more processors and the set of instructions comprising:
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instructions for receiving information indicating a spatial multiplexing mode to use for data transmission, wherein the spatial multiplexing mode is selected from among a plurality of spatial multiplexing modes supported by the system; instructions for processing, using the spatial multiplexing mode, at least one received symbol stream to obtain at least one recovered data symbol stream, wherein the spatial multiplexing mode is a non-steered spatial multiplexing mode; and instructions for demodulating and decoding the at least one recovered data symbol stream in accordance with at least one rate to obtain at least one decoded data stream. - View Dependent Claims (41, 42, 43, 44)
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Specification