Patent ID: 7539501
Filing Date: 2009-05-26
Classification: H04B,H04L,H04W,Y10S

Abstract:
1. 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, wherein the first training sequence is within a first set of subcarriers of the channel and the second training sequence is within a second set of subcarriers of the channel, wherein the first set of subcarriers is a subset of the second set of subcarriers in accordance with the first configured receiver filter mask; performing a first validation test on the first training sequence; when the first validation test is successful, performing a second validation test of the second training sequence; when the second validation test is successful, interpreting the high throughput indication; when the high throughput indication indicates a high data throughput, receiving a second preamble segment of the frame via the channel; verifying the second preamble segment to in accordance with a reconfigured receiver filter mask; and when the second preamble segment is verified, receiving a data segment of the frame in accordance with the reconfigured receiver filter mask.