Method and system for optional closed loop mechanism with adaptive modulations for multiple input multiple output (MIMO) wireless local area network (WLAN) system
First Claim
1. A method for communicating information, the method comprising:
- performing by one or more processors and/or circuits in a multiple input multiple output (MIMO) communications system;
receiving signals via a plurality of spatial streams;
computing a corresponding geometric mean signal to noise ratio (SNR) value for each of said plurality of spatial streams based on said received signals;
selecting a corresponding plurality of modulation type identifiers and/or one or more coding rate identifiers based on said plurality of computed corresponding geometric mean signal to noise ratio values;
communicating a physical layer protocol data unit (PPDU), via one or more uplink radio frequency (RF) channels, said communicated physical layer protocol data unit comprising one or more fields comprising said selected corresponding plurality of modulation type identifiers; and
receiving one or more subsequent physical layer protocol data units, wherein a header portion of said received one or more subsequent physical layer protocol data units comprises a plurality of modulation type identifier values, wherein at least a portion of said plurality of modulation type identifier values is based on at least a portion of one or both of said selected corresponding plurality of modulation type identifiers and/or said selected one or more coding rate identifiers.
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Accused Products
Abstract
Aspects of a method and system for an optional closed loop mechanism with adaptive modulations for a multiple input multiple output (MIMO) WLAN system are provided. One aspect of the system may comprise a receiver that may select, for a plurality of spatial streams, a modulation type and/or coding rate. The receiver may communicate a message, via an RF channel, that comprises a plurality of modulation types and/or coding rates. The receiver may configure for receiving subsequent data based on at least one selected modulation type and/or coding rate. Another aspect of the system may comprise a transmitter that may receive a message, via an RF channel, that comprises a specification of, for a plurality of spatial streams, a plurality of modulation types and/or coding rates. The system may configure for transmitting subsequent data based on at least one of the received modulation types and/or coding rates.
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Citations
28 Claims
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1. A method for communicating information, the method comprising:
performing by one or more processors and/or circuits in a multiple input multiple output (MIMO) communications system; receiving signals via a plurality of spatial streams; computing a corresponding geometric mean signal to noise ratio (SNR) value for each of said plurality of spatial streams based on said received signals; selecting a corresponding plurality of modulation type identifiers and/or one or more coding rate identifiers based on said plurality of computed corresponding geometric mean signal to noise ratio values; communicating a physical layer protocol data unit (PPDU), via one or more uplink radio frequency (RF) channels, said communicated physical layer protocol data unit comprising one or more fields comprising said selected corresponding plurality of modulation type identifiers; and receiving one or more subsequent physical layer protocol data units, wherein a header portion of said received one or more subsequent physical layer protocol data units comprises a plurality of modulation type identifier values, wherein at least a portion of said plurality of modulation type identifier values is based on at least a portion of one or both of said selected corresponding plurality of modulation type identifiers and/or said selected one or more coding rate identifiers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for communicating information, the method comprising:
performing by one or more processors and/or circuits in a MIMO communications system; generating a physical layer protocol data unit (PPDU); configuring a value for a closed loop indicator field, wherein a header portion of said generated physical layer protocol data unit comprises said closed loop indicator field; and transmitting said generated physical layer protocol data unit via a plurality of spatial streams, utilizing beamforming, based on said configured value for said closed loop indicator field. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system for communicating information in a multiple input multiple output (MIMO) communications system, the system comprising:
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a receiver, in a multiple input multiple output (MIMO) communications system, that is operable to receive signals via a plurality of spatial streams; said receiver is operable to compute a corresponding geometric mean signal to noise ratio (SNR) value for each of said plurality of spatial streams based on said received signals; said receiver is operable to select a corresponding plurality of modulation type identifiers and/or one or more coding rate identifiers based on said plurality of computed corresponding geometric mean signal to noise ratio values; said receiver is operable to communicate a physical layer protocol data unit (PPDU), via one or more uplink radio frequency (RF) channels, said communicated physical layer protocol data unit comprising one or more fields comprising said selected corresponding plurality of modulation type identifiers; and said receiver is operable to receive one or more subsequent physical layer protocol data units, wherein a header portion of said received one or more subsequent physical layer protocol data units comprises a plurality of modulation type identifier values, wherein at least a portion of said plurality of modulation type identifier values is based on at least a portion of one or both of said selected corresponding plurality of modulation type identifiers and/or said selected one or more coding rate identifiers. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A system for communicating information, the system comprising:
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a transmitter, for use in a MIMO communications system, said transmitter is operable to generate a physical layer protocol data unit (PPDU); said transmitter is operable to configure a value for a closed loop indicator field, wherein a header portion of said generated physical layer protocol data unit comprises said closed loop indicator field; and said transmitter is operable to transmit said generated physical layer protocol data unit via a plurality of spatial streams, utilizing beamforming, based on said configured value for said closed loop indicator field. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification