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Method for transmitting control information and apparatus for the same

  • US 8,718,173 B2
  • Filed: 02/09/2011
  • Issued: 05/06/2014
  • Est. Priority Date: 02/12/2010
  • Status: Active Grant
First Claim
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1. A method for transmitting a data unit in a wireless local area network, the method comprising:

  • transmitting, by a transmitter, a very high throughput (VHT)-SIG-A field to a receiver;

    transmitting, by the transmitter, a very high throughput (VHT)-long training field (LTF) for multiple input multiple output (MIMO) channel estimation to the receiver;

    transmitting, by the transmitter, a VHT-SIG-B field to the receiver; and

    transmitting, by the transmitter, a data field to the receiver;

    wherein the VHT-SIG-A field, the VHT-LTF, the VHT-SIG-B field and the data field are sequentially transmitted,wherein the VHT-SIG-A field includes a spatial streams indicator indicating a number of spatial streams for transmitting the data field,wherein the VHT-LTF is applied by a first mapping matrix and a second mapping matrix,wherein the data field is applied by the second mapping matrix,wherein the VHT-SIG-B field is applied by a column of the first mapping matrix and the second mapping matrix and is mapped to the spatial streams based on the applied first mapping matrix,wherein the VHT-SIG-A field is not applied by any of the first mapping matrix and the second mapping matrix, andwherein the column of the first mapping matrix is a first column element of the first mapping matrix.

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