Patent ID: 7469017

Claim:
A transmitter arrangement, comprising: a first modulation unit having a first digital signal processor and a first analogue signal generator; said first digital signal processor having a first digital signal input; a first power amplifier, connected to an output of said first analogue signal generator; a second modulation unit having a second digital signal processor and a second analogue signal generator; said second digital signal processor having a second digital signal input; a second power amplifier, connected to an output of said second analogue signal generator; a combiner device connected to outputs of said first and said second power amplifiers; a transmitter device connected to an output of said combiner device; a first power monitor sensing a total power to said transmitter device or a quantity directly related thereto; and a phase-shifter connected to said first power monitor, arranged for causing a phase shift of an analogue signal generated by said first analogue signal generator in response to said sensed total power, wherein said first digital signal processor further comprises: at least one first non-constant envelope modulation means; a first signal component separator connected to an output of said at least one first non-constant envelope modulation means; a first output of said first signal component separator being connectable to said first analogue signal generator; first means for receiving modulation instructions; at least one first constant envelope modulation means connectable to said first analogue signal generator; and first modulation selecting means for connecting a modulation means to said first digital signal input in response to received modulation instructions, said first modulation selecting means being operable on a time slot basis, and wherein said transmitter arrangement further comprises means for providing said first and said second digital signal inputs with a same digital signal, and said first and said second means for receiving instructions with the same instructions of a constant envelope modulation, allowing transmitter coherent combining.