Generating apparatus groups radio parameters, transmitter and receiver

A transmitter for use in a mobile communication system based on the scheme multiplexacionpor orthogonal frequency division, comprising: a unit (308, 310, 312, 402-416) configured to transmit transmission symbols in multiple time frame unaunica each comprising a part of the symbols guard interval and unaparte effective symbol; and a unit (320) setting radio parameters configured to generate multiplesconjuntos of radio parameters used for transmissions from the transmitting unit Y to be used in reception in a receiver, specifying each of the sets parametrosradioelectricos interval subcarrier number symbols in said single frame time and unperiodo part guard interval, and to determine any of the sets parametrosradioelectricos for use in the transmission unit, at least two of the sets of radio parameters generated by unit (320) deconfiguracion of radio parameters specify a range of common subcarrier and periods dela interval part different between self and further specified numbers endicha unique symbols plot different time each other in a symbol, so that the total period Symbol letters in this unique time frame is common.