Apparatus and method for transceiving data
AssigneeElectronics and Telecommunications Research Institute
InventorJong Soo Lim
Life of this patent
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Abstract
A data transmitting apparatus generates a plurality of modulation data symbols by symbol-mapping a plurality of input data signals, converts the plurality of modulation data symbols to a real signal of a time domain from a frequency domain, performs angle modulation of the signal, and controls and transmits the size of a sine signal of the angle-modulated real signal with a gain varying according to a control signal.
Claims20
A data transmitting apparatus comprising:
- a symbol mapper that generates a plurality of modulation data symbols by performing symbol mapping of an input signal;
- a normalizing and real signal converter that converts the plurality of modulation data symbols to a real signal of a time domain from a frequency domain;
- an angle modulation unit that performs angle modulation of the real signal;
- a peak-to-average power ratio (PAPR) control and power normalizing unit that controls the size of a sine component of an angle-modulated real signal according to a first gain and that power-normalizes a sine component and a cosine component of the real signal;
- and
- a signal transmitter that converts and transmits the power-normalized real signal to a radio frequency signal.
A data receiving apparatus comprising:
- a receiving signal processor that outputs a phase signal from a digital signal corresponding to received data;
- a power compensation unit that compensates the size of the phase signal corresponding to a size that is controlled for PAPR control in a data transmitting apparatus;
- an angle demodulation unit that performs angle demodulation of the phase signal;
- a normalizing and real signal inverse converter that converts the angle-demodulated phase signal from a time domain to a plurality of data symbols of a frequency domain through fast Fourier transform (FFT);
- a symbol demapper that generates a plurality of data signals by performing symbol demapping of the plurality of data symbols;
- and
- a parallel to serial converter that restores the receiving data by converting the plurality of data signals to a serial data signal.
A method in which a data transmitting apparatus transmits data, the method comprising:
- generating a plurality of modulation data symbols by symbol-mapping an input signal;
- converting the plurality of modulation data symbols to a real signal of a time domain from a frequency domain;
- performing angle modulation of the real number;
- controlling the size of a sine signal of the angle-modulated real number according to a predetermined gain;
- and
- converting and transmitting the angle-modulated real number to a radio frequency signal.
A method in which a data receiving apparatus receives data, the method comprising:
- generating a phase signal corresponding to a real signal in a digital signal corresponding to the received data;
- compensating the size of the phase signal to correspond to a size that is controlled for PAPR control in a data transmitting apparatus;
- performing angle demodulation of the phase signal;
- converting the angle-demodulated phase signal from a time domain to a plurality of data symbols of a frequency domain;
- and
- generating a plurality of data signals and restoring the receiving data by performing symbol demapping of the plurality of data symbols.
Dependencies are inferred from the claim text.