Patent ID: 8520669

Claim:
A method for receiving a frame in a high data throughput wireless local area network, the method comprises: prior to receiving the frame, configuring a receiver filter mask according to a first channel width of a plurality of channel widths to produce a first configured receiver filter mask; receiving a first preamble segment of the frame via a channel, wherein the first preamble segment includes a first training sequence, a second training sequence, and a high throughput indication; performing a first validation test on the first training sequence and a second validation test on the second training sequence; when the first validation test and the second validation test are successful, interpreting the high throughput indication; when the high throughput indication indicates a high data throughput, interpreting a channel format field of the frame to determine a high data throughput channel configuration, wherein the high data throughput channel configuration comprises at least one of: a second channel width of the plurality of channel widths, wherein the second channel width has 2 M subcarriers received via a single antenna and is greater in width than the first channel width; a third channel width of the plurality of channel widths, wherein the third channel has 2 K subcarriers received via the single antenna and is less in width than the first channel width; the first channel width having 2 N subcarriers received via multiple antennas; the second channel width having 2 M subcarriers received via the multiple antennas; and the third channel width having 2 K subcarriers received via the multiple antennas; reconfiguring the receiver filter mask according to the high data throughput channel configuration; and receiving a data segment of the frame in accordance with the reconfigured receiver filter mask.