Patent ID: 8718173
Filing Date: 2014-05-06
Classification: H04B,H04L,H04W

Abstract:
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, and wherein the column of the first mapping matrix is a first column element of the first mapping matrix.