Base station and broadcast channel transmission method

A base station transmitting a broadcast channel to a user device a predefined number of times in a predetermined cycle for communication with the user device, the base station comprising:

• a repetition unit configured to repeat the broadcast channel, after the broadcast channel is channel-coded, for the predefined number of times to generate multiple broadcast channels;
• a signal waveform changing unit configured to process the generated broadcast channels such that the processed broadcast channels have different signal waveforms,
• wherein positions of the broadcast channels in order of transmission in the predetermined cycle are associated with the signal waveforms of the broadcast channels;
• an interleaving unit configured to interleave information bits of the respective broadcast channels generated by the repetition unit;
• a data modulation unit configured to data-modulate the interleaved broadcast channels;
• and
• a spreading unit configured to multiply the data-modulated broadcast channels by scrambling codes,
• wherein the signal waveform changing unit is configured to control the spreading unit to multiply the respective data-modulated broadcast channels by different scrambling codes.