Patent ID: 8374279

Claim:
A modulation device for a transmission path, comprising: a signal input configured to receive a data stream to be modulated; a first signal output configured to output a first modulated high-frequency signal; a second signal output configured to output a second modulated high-frequency signal; and a coding device configured to derive at least one first complex component from the data stream; wherein the modulation device is configured to derive the first and second modulated high-frequency signals from the at least one first complex component, wherein the first modulated high-frequency signal and the second modulated high-frequency signal each comprise, in modulated form, the same information represented in the received data stream, and wherein the second high-frequency signal comprises a phase shift of substantially 90° with respect to the first high-frequency signal; a phase shifter configured to output a first signal that is derived from an input signal associated with the at least one first complex component applied to an input thereof, and at least one second signal that is derived from the input signal associated with the at least one first complex component applied to the input, the second signal comprising a phase shift of substantially 90° with respect to the first signal; at least one modulator that is distinct from the coding device, and configured to modulate the at least one first complex component derived by the coding device to generate the input signal provided to the phase shifter, an amplitude modulator configured to receive the first high-frequency signal and the second high-frequency signal and generate a first amplitude modulated high-frequency signal and a second amplitude modulated high-frequency signal based on an amplitude modulation control signal provided by the coding device based on the data stream, wherein the first and second signals from the phase shifter are associated with the first and second modulated high-frequency signals, respectively.