NON-LEGACY PREAMBLE FOR WIRELESS LOCAL AREA NETWORKS
First Claim
1. A method for receiving a preamble in multi-user (MU) multiple input multiple output (MIMO) communications, the method comprising:
- receiving the preamble comprising a short training field (STF), a first long training field (LTF), a first signal (SIG) field, at least one additional LTF, and a second SIG field, wherein the preamble is a multi-user (MU) preamble;
performing time or frequency acquisition based on the STF;
performing channel estimation based on the first LTF;
obtaining a first control information from the first SIG field; and
obtaining a second control information from the second SIG field, wherein the first control information is associated with multiple receivers and the second control information is associated with a subset of the multiple receivers.
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Accused Products
Abstract
Method and apparatus for transmission and reception of a Greenfield preamble are provided. In the method and apparatus, the Greenfield preamble may be a single user (SU) preamble or a multi user (MU) preamble. As an MU preamble, the Greenfield preamble includes a short training field (STF), a first long training field (LTF), a first signal (SIG) field, at least one additional LTF, and a second SIG field. Additionally, the Greenfield preamble may be utilized for efficient transmission and reception of control information to wireless devices, whereby the control information may be indicated using the STF, the first LTF, or the first or second SIG fields.
176 Citations
22 Claims
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1. A method for receiving a preamble in multi-user (MU) multiple input multiple output (MIMO) communications, the method comprising:
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receiving the preamble comprising a short training field (STF), a first long training field (LTF), a first signal (SIG) field, at least one additional LTF, and a second SIG field, wherein the preamble is a multi-user (MU) preamble; performing time or frequency acquisition based on the STF; performing channel estimation based on the first LTF; obtaining a first control information from the first SIG field; and obtaining a second control information from the second SIG field, wherein the first control information is associated with multiple receivers and the second control information is associated with a subset of the multiple receivers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless transmit/receive unit (WTRU) for receiving a preamble in multi-user (MU) multiple input multiple output (MIMO) communications, the WTRU comprising:
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a receiver configured to receive the preamble, the preamble comprising a short training field (STF), a first long training field (LTF), a first signal (SIG) field, at least one additional LTF, and a second SIG field, wherein the preamble is a multi-user (MU) preamble; and a processor configured to perform time or frequency acquisition based on the STF and channel estimation based on the first LTF, the processor further configured to obtain a first control information from the first SIG field and a second control information from the second SIG field, wherein the first control information is associated with multiple receivers and the second control information is associated with a subset of the multiple receivers. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification