Method and apparatus for transmitting and receiving data in a MIMO system

A wireless communication apparatus, comprising:

• a memory;
• and
• a processor operably coupled to the memory,
• wherein the processor, when executing program instructions stored in the memory, is configured to:
• determine a bandwidth of a transmission channel;
• cause the apparatus to receive a first control field through the transmission channel, the first control field comprising a first set of bits and the first set of bits indicating a length of user data;
• and
• cause the apparatus to receive a data field comprising the user data through the transmission channel,
• wherein a number of bits of the first set of bits is determined based on the bandwidth of the transmission channel.

A communication device for a station, the device comprising:

• a memory;
• and
• a processor operably coupled to the memory,
• wherein the processor, when executing program instructions stored in the memory, is configured to:
• determine a bandwidth of a transmission channel;
• cause the station to receive a first control field through the transmission channel, the first control field comprising a first set of bits and the first set of bits indicating a length of user data;
• and
• cause the station to receive a data field comprising the user data through the transmission channel,
• wherein a number of bits of the first set of bits is determined based on the bandwidth of the transmission channel.