Method of and generator for generating preamble sequences in communication systems

A generator for forming a preamble sequence in a wireless communication system, the generator comprising a hardware processor configured to implement a number of modules, the modules comprising:

• an identifying module configured to:
• determine 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;
• identify 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;
• identify 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;
• and
• identify 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
• a concatenating module configured to generate the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence in a frequency domain;
• wherein the first preamble sequence and third preamble sequence both maintain a time-domain characteristic as maintained by the first and at least one second preamble sequences.