METHOD AND SYSTEM FOR ADAPTIVE MODULATIONS AND SIGNAL FIELD FOR CLOSED LOOP MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS LOCAL AREA NETWORK (WLAN) SYSTEM
First Claim
1. A method for communicating information in a communications system, the method comprising:
- in a multiple input multiple output (MIMO) communication system utilizing a plurality of modulation types and a plurality of spatial streams, selecting a current modulation type for modulating a current spatial stream to be transmitted;
selecting at least one subsequent modulation type based on said selected current modulation type, for modulating at least one subsequent spatial stream to be transmitted;
communicating a message indicating said selected current modulation type, and said at least one selected subsequent modulation type via an radio frequency (RF) channel to a transmitter; and
configuring a receiver to receive subsequent data based on at least one of;
said selected current modulation type and said at least one selected subsequent modulation type.
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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 utilize properties of Eigenvalue analysis of MIMO systems to reduce the number of bits of binary information required to select a modulation type among a plurality of modulation types for each spatial stream among a plurality of spatial streams. This provides a reduction in the required number of bits when compared to other approaches and accordingly, enable greater flexibility in systems that utilize closed loop feedback mechanisms.
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Citations
23 Claims
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1. A method for communicating information in a communications system, the method comprising:
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in a multiple input multiple output (MIMO) communication system utilizing a plurality of modulation types and a plurality of spatial streams, selecting a current modulation type for modulating a current spatial stream to be transmitted;
selecting at least one subsequent modulation type based on said selected current modulation type, for modulating at least one subsequent spatial stream to be transmitted;
communicating a message indicating said selected current modulation type, and said at least one selected subsequent modulation type via an radio frequency (RF) channel to a transmitter; and
configuring a receiver to receive subsequent data based on at least one of;
said selected current modulation type and said at least one selected subsequent modulation type. - View Dependent Claims (2, 3, 4, 5)
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6. A method for communicating information in a communications system, the method comprising:
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in a multiple input multiple output (MIMO) communication system utilizing a plurality of modulation types and a plurality of spatial streams, selecting a current modulation type for modulating a current spatial stream to be transmitted;
selecting at least one subsequent modulation type based on said selected current modulation type, for modulating at least one subsequent spatial stream to be transmitted;
transmitting a message indicating said selected current modulation type, and said at least one selected subsequent modulation type via an radio frequency (RF) channel to a receiver; and
configuring a transmitter to transmit subsequent data based on at least one of;
said selected current modulation type, and said at least one selected subsequent modulation type. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A system for communicating information in a communications system, the system comprising:
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circuitry, in a multiple input multiple output (MIMO) communication system utilizing a plurality of modulation types and a plurality of spatial streams, that selects a current modulation type for modulating a current spatial stream to be transmitted;
said circuitry selects at least one subsequent modulation type based on said selected current modulation type, for modulating at least one subsequent spatial stream to be transmitted;
said circuitry communicates a message indicating said selected current modulation type, and said at least one selected subsequent modulation type via an radio frequency (RF) channel to a transmitter; and
said circuitry configures to communicate subsequent data based on at least one of;
said selected current modulation type and said at least one selected subsequent modulation type. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification