<p>The method involves utilizing a frequency band that is subdivided into number of sub carriers. Messages e.g. speech information, are transmitted from a base station to a subscriber station and from a subscriber station to the base station using frequency band. The messages are processed by utilizing orthogonal frequency division multiple access (OFDMA) and interleaved FDMA (IFDMA)-procedures. Independent claims are also included for the following: (1) a transmitter for a radio communication system (2) a receiver for a radio communication system.</p>
