Patent ID: 8289910

Claim:
A device for transmitting mobile telephony signals-by multiple transmit branches, the device comprising a remote radio head (RRH) which is positioned near to an antenna and remotely to a radio server or base station, the remote radio head being connected to the radio server or base station by a main connecting line, the remote radio head comprising: at least 4 radio frequency channels (K 1 , K 2 , K 3 , K 4 ) each comprising a transmitter unit for sending radio frequency transmission signals (TX), at least one power amplifier provided in each of said radio frequency channels (K 1 , K 2 , K 3 , K 4 ) for conditioning the radio frequency transmission signals (TX), connections on the antenna side for sending the radio frequency transmission signals (TX) with a downstream radio frequency antenna device (ANT; ANT 1 , ANT 2 , ANT 3 , ANT 4 ), a filter stage (DF 1 , DF 2 , DF 3 , DF 4 ) provided in each said radio frequency channel (K; K 1 , K 2 , K 3 , K 4 ); separate channel modules (KM 1 , KM 2 , KM 3 , KM 4 ), each of the at least 4 radio frequency channels (K 1 , K 2 , K 3 , K 4 ) configured to be driven or fed with a radio frequency transmission signal that is different from the other channels, generated with the separate channel modules (KM 1 , KM 2 , KM 3 , KM 4 ) from various digital data streams, the digital data streams for generating RF transmitting signals in separate radio frequency channels (K 1 , K 2 , K 3 , K 4 ) being transmitted via the common main connecting line; and a controller device, via which several or all of the power amplifiers, which are connected in several or all of the at least 4 radio frequency channels (K; K 1 , K 2 , K 3 , K 4 ), in-phase or phase-locked with each other, in such a way that the radio frequency transmission signals (TX) amplified in the radio frequency channels (K; K 1 , K 2 , K 3 , K 4 ) are synchronized and interconnected and within a same radio frequency band, as a result of which a transmission signal can be radiated with a higher transmission power.