Patent ID: 8548074

Claim:
An apparatus for use in a base station in a wireless communication system, the apparatus comprising: a sequence generator configured to generate a preamble sequence based on a carrier configuration and a bandwidth; a modulator configured to modulate the preamble sequence; a subcarrier mapper configured to map the modulated preamble sequence to subcarriers in a predefined subcarrier set that is determined by a predefined rule, the subcarriers in the predefined subcarrier set being spaced one subcarrier interval apart; and a transmitter configured to transmit the preamble sequence, wherein the subcarrier set (PSCHCarrierSet) is configured according to the equation: PSCHCarrierSet=2· k+ 41 where PSCHCarrierSet corresponds to indexes of subcarriers allocated for the preamble and k corresponds to an integer between 0 and 215 inclusive, wherein an index value =256 corresponds to a Direct Current (DC) subcarrier.