Transmitter, receiver, and wireless communication method thereof
A transmitter is configured to transmit a radio frequency (RF) signal to a receiver. The receiver is configured to receive the RF signal and decode data. Furthermore, a method of wireless communication is provided between the transmitter and the receiver, in which the transmitter transmits to the receiver the RF signal. A carrier phase of the RF signal is randomly converted. The receiver detects an envelope of the RF signal, and extracts data from the RF signal.
1. A communication apparatus, comprising:
a generator configured to convert input data to a pulse;
a converter configured to randomly change a phase of a radio frequency (RF) oscillating signal based on a transmission period of a transmission symbol; and
a transmitter configured to convert the pulse to an RF signal based on the RF oscillating signal of which the phase is randomly changed, and transmit the RF signal to a receiver.
2. The communication apparatus of claim 1 , wherein the converter is configured to randomly reverse a phase of the RF oscillating signal in a time interval determined based on the transmission period of the transmission symbol.
3. The communication apparatus of claim 1 , wherein the converter is configured to randomly change the phase of the RF oscillating signal in a time interval determined based on the transmission period of the transmission symbol to a predetermined value.
4. The communication apparatus of claim 1 , wherein the converter is configured to control an operation of an oscillator outputting the RF oscillating signal, and change the phase of the RF oscillating signal to a continuous phase value.
5. The communication apparatus of claim 1 , wherein the converter is configured to apply a function including a random value in a time interval, which is based on the transmission period of the transmission symbol, to the RF oscillating signal and change the phase of the RF oscillating signal.
6. The communication apparatus of claim 1 , wherein the converter is configured to determine change periods of the phase corresponding to a positive integer multiple of the transmission period of the transmission symbol, and randomly change the phase of the RF oscillating signal for the change periods.
7. The communication apparatus of claim 1 , wherein the transmitter is configured to transmit the RF signal to the receiver to decode data based on an envelope of the received RF signal.
8. The communication apparatus of claim 1 , wherein the transmitter is configured to transmit the RF signal to the receiver to decode data without using carrier phase information of the RF signal.
9. The communication apparatus of claim 1 , wherein the generator comprises:
a data encoder configured to map input data to an element set; and
a pulse shaper configured to generate the pulse corresponding to the data based on a result of the mapping.
10. The communication apparatus of claim 9 , wherein the pulse shaper is configured to overlap pulses corresponding to a data sequence on a time axis, convert the data sequence to a pulse series, and adjust a shape of each pulse to avoid distortion of a transmission waveform in a limited bandwidth while transmitting the transmission waveform corresponding to a transmission bit.
11. A method of wireless communication at a communication apparatus, comprising:
converting input data to a pulse;
randomly changing a phase of a radio frequency (RF) oscillating signal based on a transmission period of a transmission signal;
converting the pulse to an RF signal based on the RF oscillating signal of which the phase is randomly changed; and
transmitting the RF signal to a receiver.
12. The method of claim 11 , further comprising: randomly reversing a phase of the RF oscillating signal in a time interval determined based on the transmission period of the transmission symbol.
13. The method of claim 11 , further comprising: randomly changing the phase of the RF oscillating signal in a time interval determined based on the transmission period of the transmission symbol to a predetermined value.
14. The method of claim 11 , further comprising: controlling an operation of an oscillator outputting the RF oscillating signal, and changing the phase of the RF oscillating signal to a continuous phase value.
15. The method of claim 11 , further comprising: applying a function including a random value in a time interval, which is based on the transmission period of the transmission symbol, to the RF oscillating signal and changing the phase of the RF oscillating signal.
16. The method of claim 11 , further comprising: transmitting the RF signal to the receiver to decode data without using carrier phase information of the RF signal.
17. The method of claim 11 , further comprising:
mapping input data to an element set; and
generating the pulse corresponding to the data based on a result of the mapping.
18. The method of claim 11 , further comprising:
overlapping pulses corresponding to a data sequence on a time axis;
converting the data sequence to a pulse series; and
adjusting a shape of each pulse to avoid distortion of a transmission waveform in a limited bandwidth while transmitting the transmission waveform corresponding to a transmission bit.
19. A communication apparatus, comprising:
a generator configured to convert input data to a pulse, the generator comprising
a data encoder configured to map input data to an element set; and
a pulse shaper configured to generate the pulse corresponding to the data based on a result of the mapping;
a converter configured to randomly change a phase of a radio frequency (RF) oscillating signal based on a transmission period of a transmission symbol; and
a transmitter configured to convert the pulse to an RF signal based on the RF oscillating signal of which the phase is randomly changed, and transmit the RF signal to a receiver.