Patent ID: 8693356

Claim:
A method for determining a first amount of a plurality of high-throughput long training fields within a packet in a wireless communication system, comprising: determining a second amount of a plurality of space time streams needed by the wireless communication system transmitting the packet; setting the first amount to be equal to 8 for at least two different values of the second amount of the plurality of space time streams when the second amount equals any integer selected from 5 to 8; and setting a spreading code matrix P, for transforming the plurality of high-throughput long training field by the wireless communication system, to be: P = [ P ⁢ ⁢ 11 P ⁢ ⁢ 12 P ⁢ ⁢ 21 P ⁢ ⁢ 22 ] ; wherein P11, P12, P21, and P22 are 4×4 matrixes, respectively.