Method and apparatus for implementing a transmission connection

A transmitter system for transmitting a digital bit stream, the system comprising:

• symbol forming means for forming symbols from the bit stream to be transmitted,
• carrier generating means for generating carriers on several different frequency bands, and
• allocating means for allocating symbols among carriers in such a way that each carrier is modulated with some of the bits in the bit stream,
• wherein the carrier generating means comprise
• first means for generating modulated carriers at predetermined first frequencies, and
• a halfband filter bank to which at least some of the carriers generated by the first means are connected for transferring the carriers to their final frequency bands in the frequency domain.

A transceiver system for transmitting and receiving a digital bit stream, said system comprising:

• at the transmitter end
• symbol forming means for forming symbols from the bit stream to be transmitted,
• carrier generating means for generating carriers on several different frequency bands,
• allocating means for allocating the symbols among carriers in such a way that each carrier is modulated with some of the bits in the bit stream,
• and at the receiver end
• detection means for detecting symbols from the received carriers, and
• symbol identification means for forming a bit stream from the received symbols, wherein
• the carrier generating means comprise first means for generating modulated carriers at predetermined first frequencies and a first halfband filter bank to which at least some of the carriers generated by the first means are connected for transferring the carriers to their final frequency bands in the frequency domain, and that
• the detection means comprise the second halfband filter bank to which at least some of the received carriers are connected for transferring the carriers to predetermined lower frequency bands.