Patent ID: 8331480

Claim:
A method of forming a preamble sequence in a wireless communication system, the method comprising: determining a value K>1 related to a time-domain characteristic of the wireless communication system, the time-domain characteristic being that a time-domain preamble sequence includes a number of K waveforms similar in shape to one another having a linear phase shift; identifying a first preamble sequence for a first frequency band, the first preamble sequence in a frequency domain having a plurality of tones defining a first length that is not an integer multiple of K, the first preamble sequence maintaining the time-domain characteristic; identifying at least one second preamble sequence each for a second, different frequency band, the at least one second preamble sequence in the frequency domain having at least one plurality of tones defining at least one second length, the at least one second preamble sequence maintaining the time-domain characteristic as maintained by the first preamble sequence; identifying the length of a third preamble sequence, the length of the third preamble sequence equal to a sum of the first length and the at least one second length; and forming the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence in the frequency domain, the third preamble sequence maintaining the time-domain characteristic as maintained by the first and at least one second preamble sequences.