SYSTEMS AND METHODS EMPLOYING MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TECHNIQUES
First Claim
Patent Images
1. A system for supporting forward link multi input multi output (MIMO) communications, comprising:
- a plurality of antennas;
a Time Division Multiplexing (TDM) module creating a plurality of TDM slots;
demultiplexing circuitry inserting within the plurality of TDM slots a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with a plurality of data sub-streams; and
precoding circuitry associating the plurality of data sub-streams with a plurality of tones, wherein each of the respective tones corresponds to a respective one of the antennas, the plurality of antennas transmitting the plurality of data sub-streams using the plurality of tones.
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Abstract
A system has multiple antennas, a Time Division Multiplexing (TDM) module creating TDM slots, and demultiplexing circuitry inserting within the TDM slots Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with data sub-streams. The system also includes precoding circuitry associating the data sub-streams with multiple tones. Each of the respective tones corresponds to a respective one of the antennas. The antennas transmit the data sub-streams using the multiple tones.
56 Citations
29 Claims
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1. A system for supporting forward link multi input multi output (MIMO) communications, comprising:
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a plurality of antennas; a Time Division Multiplexing (TDM) module creating a plurality of TDM slots; demultiplexing circuitry inserting within the plurality of TDM slots a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with a plurality of data sub-streams; and precoding circuitry associating the plurality of data sub-streams with a plurality of tones, wherein each of the respective tones corresponds to a respective one of the antennas, the plurality of antennas transmitting the plurality of data sub-streams using the plurality of tones. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for supporting forward link multi input multi output (MIMO) communications, comprising:
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generating a plurality of Time Division Multiplexing (TDM) slots; associating the plurality of TDM slots with a plurality of data sub-streams; inserting Orthogonal Frequency Division Multiplexing (OFDM) symbols into the TDM slots; processing the TDM slots with the OFDM symbols using a precoding matrix, thereby associating the data sub-streams with a plurality of tones, each of the tones corresponding to a respective one of a plurality of antennas; and transmitting the data sub-streams to a remote unit using the plurality of tones and the plurality of antennas. - View Dependent Claims (13, 14, 15, 16)
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17. A system for supporting forward link multi input multi output (MIMO) communications, comprising:
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a plurality of antennas; means for creating a plurality of TDM slots; means for inserting within the plurality of TDM slots a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols and associating the TDM slots with a plurality of data sub-streams; and means for associating the plurality of data sub-streams with a plurality of tones, wherein each of the respective tones corresponds to a respective one of the antennas, the plurality of antennas transmitting the plurality of data sub-streams using the plurality of tones. - View Dependent Claims (18, 19, 20, 21)
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22. A computer program product for supporting forward link multi input multi output (MIMO) communications, tangibly embodying a computer readable medium having computer program logic recorded thereon, the computer program product comprising:
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code that generates a plurality of Time Division Multiplexing (TDM) slots; code that associates the plurality of TDM slots with a plurality of data sub-streams; code that inserts Orthogonal Frequency Division Multiplexing (OFDM) symbols into the TDM slots; and code that processes the TDM slots with the OFDM symbols using a precoding matrix, thereby associating the data sub-streams with a plurality of tones, each of the tones corresponding to a respective one of a plurality of antennas. - View Dependent Claims (23, 24, 25)
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26. A system for supporting forward link multi input multi output (MIMO) communications comprising:
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a plurality of antennas receiving a plurality of data sub-streams on a plurality of tones, each of the data sub-streams including; a plurality of Time Division Multiplexing (TDM) slots with Orthogonal Frequency Division Multiplexing (OFDM) symbols therein; a plurality of first pilots possibly overlapping with data in data transmissions; and a plurality of second pilots embedded within the OFDM symbols; circuitry multiplexing the data sub-streams and decoding the data in the data sub-streams; circuitry using the first pilots to derive precoding information, spatial multiplexing order information and data rate information and using the second pilots to detect preambles of packets of the data sub-streams and to demodulate and to decode the data sub-streams; and circuitry feeding back the precoding information, spatial multiplexing order information, and data rate information to a base station. - View Dependent Claims (27, 28, 29)
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Specification