Transmission device and method as well as reception device and method
The present technology relates to a transmission device and method as well as a reception device and method which can suppress the influence of interference. The transmission device sets different methods of changing the frequency of the chirp modulation for each of first information and second information different from the first information. The transmission device transmits the chirp-modulated first information or second information in accordance with the set frequency change method. The present technology can be applied to a wireless communication system.
1. A transmission device, comprising:
a control unit configured to:
determine whether a frame to be transmitted corresponds to first information or second information;
set a first frequency change of chirp modulation for a chirp signal of the frame based on the determination that the frame corresponds to the first information; and
set a second frequency change of the chirp modulation for the chirp signal of the frame based on the determination that the frame corresponds to the second information different from the first information, wherein the second frequency change is different from the first frequency change; and
a transmission unit configured to transmit the first information and the second information that have undergone the chirp modulation.
2. The transmission device according to claim 1 , wherein the control unit is further configured to set a different increase/decrease direction of a frequency change of the chirp modulation in each of the first information and the second information.
3. The transmission device according to claim 2 , wherein the control unit is further configured to:
set an increase/decrease direction of the frequency change of the first information to a down chirp; and
set the increase/decrease direction of the frequency change of the second information to an up chirp.
4. The transmission device according to claim 3 , wherein
the first information includes a control frame, and
the second information includes a data frame.
5. The transmission device according to claim 3 , wherein
the first information includes a downlink (DL) frame, and
the second information includes an uplink (UL) frame.
6. The transmission device according to claim 1 , wherein the control unit is further configured to set a different rate of a frequency change of the chirp modulation for each of the first information and the second information.
7. The transmission device according to claim 6 , wherein the control unit is further configured to:
set a rate of the frequency change of the first information to α; and
set a rate of the frequency change of the second information to β (α>β).
8. The transmission device according to claim 7 , wherein
the first information includes a control frame, and
the second information includes a data frame.
9. The transmission device according to claim 7 , wherein
the first information includes a DL frame, and
the second information includes a UL frame.
10. A transmission method, comprising:
in a transmission device:
determining whether a frame to be transmitted corresponds to first information or second information;
setting a first frequency change of chirp modulation for a chirp signal of the frame based on the determination that the frame corresponds to the first information;
setting a second frequency change of the chirp modulation for the chirp signal of the frame based on the determination that the frame corresponds to the second information different from the first information, wherein the second frequency change is different from the first frequency change; and
transmitting the first information and the second information that have undergone the chirp modulation.
11. A reception device, comprising:
a reception unit configured to receive first information and second information that has undergone chirp modulation in accordance with a different frequency change of the chirp modulation set for each of a chirp signal of the first information and a chirp signal of the second information different from the first information; and
a demodulation unit configured to:
demodulate the first information in accordance with a first frequency change; and
demodulate the second information in accordance with a second frequency change different from the first frequency change.
12. The reception device according to claim 11 , wherein the demodulation unit is further configured to demodulate one of the first information or the second information according to an increase/decrease direction of the different frequency change set for each of the first information and the second information.
13. The reception device according to claim 12 , wherein
the increase/decrease direction of a frequency change of the first information is set to a down chirp, and
the increase/decrease direction of the frequency change of the second information is set to an up chirp.
14. The reception device according to claim 13 , wherein
the first information includes a control frame, and
the second information includes a data frame.
15. The reception device according to claim 13 , wherein
the first information includes a DL frame, and
the second information includes a UL frame.
16. The reception device according to claim 11 , wherein the demodulation unit is further configured to demodulate one of the first information or the second information in accordance with a different rate of a frequency change of the chirp modulation set for each of the first information and the second information.
17. The reception device according to claim 16 , wherein
a rate of the frequency change of the first information is set to α, and
a rate of the frequency change of the second information is set to β (α>β).
18. The reception device according to claim 17 , wherein
the first information includes a control frame, and
the second information includes a data frame.
19. The reception device according to claim 17 , wherein
the first information includes a DL frame, and
the second information includes a UL frame.
20. A reception method, comprising:
in a reception device:
receiving first information and second information that has undergone chirp modulation in accordance with a different frequency change of the chirp modulation set for each of a chirp signal of the first information and a chirp signal of the second information different from the first information;
demodulating the first information in accordance with a first frequency change; and
demodulating the second information in accordance with a second frequency change different from the first frequency change.