Patent ID: 9609092
Date: 2017-03-28
CPC Classifications: H04L,H04W

Claim:
1. A method in a wireless OFDM transceiver, the method comprising: transmitting, by a transmitter, a first packet using wireless OFDM communications, wherein the first packet comprises a first plurality of short training symbols followed by a first plurality of long training symbols followed by a first header portion; indicating, by a modulator/encoder module connected to and in communication with the transmitter, that the first packet is associated with a first channel bandwidth based on at least a first phase of at least one subcarrier in the first plurality of long training symbols; transmitting, by the transmitter, a second packet using wireless OFDM communications, wherein the second packet comprises a second plurality of short training symbols followed by a second plurality of long training symbols followed by a second header portion; and indicating, by the modulator/encoder module, that the second packet is associated with a second channel bandwidth based on at least a second phase of the at least one subcarrier in the second plurality of long training symbols, wherein the first phase is different than the second phase, wherein the first channel bandwidth and the second channel bandwidth have one or more overlapping frequency regions, and wherein the second channel bandwidth is wider than the first channel bandwidth; and transmitting, by the transmitter, a first plurality of header information bits in the first header portion using a first mapping of heading information bits to subcarriers in the one or more overlapped frequency regions in the first channel bandwidth, wherein the first mapping determines a first order in which the first plurality of header information bits are mapped to subcarriers; and transmitting, by the transmitter, a second plurality of header information bits in the second header portion using a second mapping, different than the first mapping, of header information bits to subcarriers in the one or more overlapped frequency regions in the second channel bandwidth wherein the second mapping determines a second order, different than the first order, in which the second plurality of header information bits are mapped to subcarriers.