RADIO COMMUNICATION TRANSMITTER APPARATUS AND METHOD

• Main Authors: JOHANSSON, BERNT, BERGLUND, BO
• Format: Patent
• Language: English; French; German
• Published: 10.02.2016
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A radio communication transmitter apparatus 20 is operable to transmit multiple radio frequency bands in a telecommunication system. The apparatus comprises a plurality of digital transmitter chains 21 1 to 21 N , wherein each digital transmitter chain is coupled to receive a digital representation 27 1 to 27 N of a respective base band signal for processing by a respective digital transmitter chain. Each digital transmitter chain 21 1 to 21 N comprises a digital transmitter 25i to 25 N that is adapted to convert a respective digital base band signal directly into a digital representation of a radio frequency signal 23i to 23 N . A digital combining unit 25 is coupled to receive the output of each digital transmitter chain 21 1 to 21 N , and adapted to combine the digital representation of a radio frequency signal 23i to 23 N received from each digital transmitter chain 21 1 to 21 N into a digital representation of a radio frequency signal 26 comprising multiple radio frequency bands. A digital to analogue converter 27 is coupled to receive the digital representation of a radio frequency signal 26 comprising multiple radio frequency bands, and adapted to convert the digital representation of a radio frequency signal 26 into an analogue radio frequency signal 28 comprising multiple radio frequency bands.