Patent ID: 8054816
Filing Date: 2011-11-08
Classification: H04B,H04L

Abstract:
1. A method for hopping frequencies of an orthogonal frequency division multiplexing (OFDM) symbol, comprising: receiving a physical layer convergence procedure (PLCP) header for an OFDM symbol comprising mapping information about a pattern of disposing a plurality of sub-carriers of the OFDM symbol, a pattern of setting frequencies of the OFDM symbol, and locations of pilots in the OFDM symbol; and disposing the plurality of sub-carriers of the OFDM symbol in a frequency domain, setting the frequencies of the OFDM symbol at each time unit, and setting the locations of the pilots of the OFDM symbol in the frequency domain based on the mapping information, wherein the disposing the plurality of sub-carriers of the OFDM symbol comprises at least one of grouping the plurality of sub-carriers of the OFDM symbol into a plurality of groups in the frequency domain and distributing the plurality of sub-carriers of the OFDM symbol in the frequency domain, wherein the grouping the sub-carriers of the OFDM symbol into the plurality of groups comprises: wherein the setting the frequencies of the OFDM symbol at each time unit is performed by hopping the frequencies of the plurality of sub-carriers at each time unit, and wherein the first sub-carriers are set to use first frequencies for transmission by the OFDM symbol transmitter, and the second sub-carriers are set to use second frequencies, which are hopped from the first frequencies, for transmission by the OFDM symbol transmitter.