Method for transmitting control information and apparatus for the same

A device for a wireless local area network, the device comprising:

• a transceiver configured to transmit and receive radio signals;
• and
• a processor operatively coupled to the transceiver and configured to:
• instruct the transceiver to transmit a first long training field (LTF) to a receiver;
• instruct the transceiver to transmit a very high throughput (VHT)-SIG-A field to the receiver;
• instruct the transceiver to transmit a second LTF for multiple input multiple output (MIMO) channel estimation to the receiver;
• instruct the transceiver to transmit a VHT-SIG-B field to the receiver;
• and
• instruct the transceiver to transmit a data field to the receiver,
• wherein the first LTF, the VHT-SIG-A field, the second LTF, the VHT-SIG-B field and the data field are sequentially transmitted,
• wherein the second LTF and the data field are mapped to at least one spatial stream based on a mapping matrix,
• whererin the first LTF and the VHT SIG-A field are not applied by the mapping matrix, and
• wherein the VHT-SIG-B field is mapped to the at least one spatial stream based on a single column vector and the mapping matrix.

A method for receiving data in a wireless local area network, the method comprising:

• receiving, by a receiver, a first long training field (LTF) from to a transmitter;
• receiving, by the receiver, a very high throughput (VHT)-SIG-A field from the transmitter;
• receiving, by the receiver, a second LTF for multiple input multiple output (MIMO) channel estimation from the transmitter;
• receiving, by the receiver, a VHT-SIG-B field from the transmitter;
• and
• receiving, by the receiver, a data field from the transmitter,
• wherein the first LTF, the VHT-SIG-A field, the second LTF, the VHT-SIG-B field and the data field are sequentially received,
• wherein the second LTF and the data field are mapped to at least one spatial stream based on a mapping matrix,
• wherein the first LTF and the VHT SIG-A field are not applied by the mapping matrix, and
• wherein the VHT-SIG-B field is mapped to the at least one spatial stream based on a single column vector and the mapping matrix.

A device for a wireless local area network, the device comprising:

• a transceiver configured to transmit and receive radio signals;
• and
• a processor operatively coupled to the transceiver and configured to:
• instruct the transceiver to receive a first long training field (LTF) from a transmitter;
• instruct the transceiver to receive a very high throughput (VHT)-SIG-A field from the transmitter;
• instruct the transceiver to receive a second LTF for multiple input multiple output (MIMO) channel estimation from the transmitter;
• instruct the transceiver to receive a VHT-SIG-B field from the transmitter;
• and
• instruct the transceiver to receive a data field from the transmitter,
• wherein the first LTF, the VHT-SIG-A field, the second LTF, the VHT-SIG-B field and the data field are sequentially received,
• wherein the second LTF and the data field are mapped to at least one spatial stream based on a mapping matrix,
• wherein the first LTF and the VHT SIG-A field are not applied by the mapping matrix, and
• wherein the VHT-SIG-B field is mapped to the at least one spatial stream based on a single column vector and the mapping matrix.