A data transmitter is provided, having: a generator for generating transmission data packets, configured to split a first data packet into at least three transmission data packets, each of the transmission packets being shorter than the first data packet, the generator being configured to channel-encode the at least three transmission packets such that only a portion thereof is required for decoding the first data packet; a transmission element for transmitting data packets, configured to transmit the at least three transmission packets in a frequency channel via a communications channel with a time gap; a monitor element for monitoring the frequency channel, configured to recognize an interference or transmission of a further data transmitter in the frequency channel; the transmission element being configured not to transmit via the communications channel a packet, waiting for transmission, of the at least three transmission packets if an interference or transmission from a further data transmitter is recognized by the monitor element at the time of transmitting the transmission data packet.