Method and solution of data transmission from the transponder to the reader, especially in payment solutions with a mobile communication device

A method for transmitting data from a transmitter to a receiver, the transmitter having a transmitter antenna and the receiver having a receiver antenna, the method comprising:

• the receiver transmitting a carrier signal at a carrier frequency;
• the transmitter transmitting a transmitter signal at a transmitter transmission frequency, wherein the transmitter transmission frequency is different from the carrier frequency, and the difference between the transmitter transmission frequency and the carrier frequency defines a subcarrier frequency;
• the transmitter modulating the data on the transmitter signal;
• and
• the receiver receiving a received signal that is created by combining the carrier signal with the modulated transmitter signal, and demodulating the received signal as a combined signal having the carrier frequency and a modulated subcarrier frequency that is modulated with received data,
• wherein the received signal is created only via mutual antenna induction and without the transmitter transmitting a signal at the subcarrier frequency.

A method for transmitting data from a transmitter to a receiver, the transmitter having a transmitter antenna and the receiver having a receiver antenna, the method comprising:

• the receiver transmitting a carrier signal at a carrier frequency;
• the transmitter transmitting a transmitter signal at a transmitter transmission frequency, wherein the transmitter transmission frequency is different from the carrier frequency, and the difference between the transmitter transmission frequency and the carrier frequency defines a subcarrier frequency;
• the transmitter modulating the data on the transmitter signal;
• and
• combining the carrier signal and the modulated transmitter signal in an antenna system of the receiver and the transmitter to form a combined signal;
• the receiver receiving the combined signal, and demodulating the received combined signal by separating the carrier signal from the combined signal to form a modulated subcarrier signal, and demodulating the transmitted data from the modulated subcarrier signal.

A transmitter for transmitting data to a receiver, the receiver having a receiver antenna and transmitting at a carrier frequency, the transmitter comprising:

• a transmitter antenna;
• and
• a modulation element comprising an electromagnetic wave generator operating at a frequency that is different from the carrier frequency,
• wherein the electromagnetic wave generator is connected to energize the transmitter antenna when transmitting data over a transformer connection of mutual induction between the transmitter antenna and the receiver antenna.

A receiver for receiving data transmitted from a transmitter, the transmitter having a transmitter antenna and transmitting a modulated transmitter signal at a transmitter transmission frequency, the receiver comprising:

• a receiver antenna;
• and
• a demodulation element that is connected to a turning of an induction of the transmitter antenna toward a sensor resistor via an inductor,
• wherein the receiver transmits a carrier signal at a carrier frequency, receives a received signal that is created by combining the carrier signal with the modulated transmitter signal, and demodulates the received signal as a combined signal having the carrier frequency and a modulated subcarrier frequency that is modulated with received data,
• wherein the received signal is created only via mutual antenna induction and without the transmitter transmitting a signal at the subcarrier frequency.