METHOD AND SYSTEM FOR DETECTING PACKET TYPE
It is therefore an object of the present invention to provide a method for detecting different packet type. The method comprises, determining whether the rate of a received packet corresponds to a predetermined rate, derotating the bits of a symbol in the received packet, obtaining an energy different of the symbol at different axes, and determining the type of the received packet according to the energy difference.
1 . A method of communicating packets of different types in a transmitter, the method comprising:
determining whether a rate of received packet corresponds to a predetermined rate;
derotating bits of a symbol in the received packet if the packet is at the predetermined rate;
obtaining an energy difference of the symbol at different axes; and
determining the type of received packet based on the energy difference.
2 . The method of claim 1 , wherein the difference of energies between the in phase part and the quadrature part of even and off subcarriers are calculated.
3 . The method of claim 1 , wherein the predetermined rate is 9 Mbits/sec.
4 . The method of claim 1 , wherein the type of received packets comprise any of a 11a/g packet, 11n packet and a 11ac packet.
5 . A system of communicating packets of different types in a receiver, the method comprising:
means for determining whether a rate of received packet corresponds to a predetermined rate;
means for derotating bits of a symbol in the received packet if the packet is at the predetermined rate;
means for obtaining an energy difference of the symbol at different axes; and
means for determining the type of received packet based on the energy difference.
6 . The system of claim 5 , wherein the difference of energies between the in phase part and the quadrature part of even and off subcarriers are calculated.
7 . The system of claim 5 , wherein the predetermined rate is 9 Mbits/sec.
8 . The system of claim 5 , wherein the type of received packets comprise any of a 11a/g packet, 11n packet and a 11ac packet.