Reception device, reception method, and program
View Patent ↗There is provided a reception device including a reception unit configured to receive an OFDM (Orthogonal Frequency Division Multiplexing) signal, an acquisition unit configured to acquire a transmission parameter concerning the OFDM signal contained in the OFDM signal, and a selection unit configured to select a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter.
1. A reception device comprising:
a reception unit configured to receive an OFDM (Orthogonal Frequency Division Multiplexing) signal;
an acquisition unit configured to acquire a transmission parameter of the OFDM signal contained in the OFDM signal; and
a selection unit configured to select a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter,
wherein,
the transmission parameter contains at least a first parameter indicating that a communication mode is SISO (Single Input Single Output) or MISO (Multiple Input Single Output), a second parameter indicating presence/absence of a second frame having a different structure from a first frame as a unit of transmitting data in a predetermined standard, a third parameter indicating an arrangement of pilot signals, or a fourth parameter indicating a frame length of the first frame,
the selection unit selects the demodulation mode in accordance with each parameter or a combination of the parameters,
the selection unit selects an equalization mode as the demodulation mode,
the equalization mode is an interpolation type mode in which frequency direction interpolation of a channel estimate estimated by time interpolation between the pilot signals is performed or a frequency direction interpolation type mode in which interpolation is performed only in a frequency direction, and
the selection unit selects the frequency direction interpolation type mode when the second parameter indicates that the second frame is present.
2. The reception device according to claim 1 , wherein the selection unit selects a noise estimation mode as the demodulation mode.
3. The reception device according to claim 1 , wherein the selection unit selects the demodulation mode in accordance with a symbol position defined by the transmission parameter.
4. The reception device according to claim 3 , wherein the selection unit selects an equalization mode as the demodulation mode.
5. The reception device according to claim 3 , wherein the selection unit selects a noise estimation mode as the demodulation mode.
6. A reception device comprising:
a reception unit configured to receive an OFDM (Orthogonal Frequency Division Multiplexing) signal;
an acquisition unit configured to acquire a transmission parameter of the OFDM signal contained in the OFDM signal; and
a selection unit configured to select a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter,
wherein,
the transmission parameter contains at least a first parameter indicating that a communication mode is SISO (Single Input Single Output) or MISO (Multiple Input Single Output), a second parameter indicating presence/absence of a second frame having a different structure from a first frame as a unit of transmitting data in a predetermined standard, a third parameter indicating an arrangement of pilot signals, or a fourth parameter indicating a frame length of the first frame,
the selection unit selects the demodulation mode in accordance with each parameter or a combination of the parameters,
the selection unit selects a noise estimation mode as the demodulation mode,
the noise estimation mode is a pilot estimation mode in which the pilot signals are used or a fixed value mode in which a pre-defined fixed value is used, and
the selection unit selects the fixed value mode when the second parameter indicates that the second frame is present and the frame length indicated by the fourth parameter is equal to or less than a predetermined threshold.
7. A reception device comprising:
a reception unit configured to receive an OFDM (Orthogonal Frequency Division Multiplexing) signal;
an acquisition unit configured to acquire a transmission parameter of the OFDM signal contained in the OFDM signal; and
a selection unit configured to select a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter,
wherein
the transmission parameter contains at least a first parameter indicating that a communication mode is SISO (Single Input Single Output) or MISO (Multiple Input Single Output), a second parameter indicating presence/absence of a second frame having a different structure from a first frame as a unit of transmitting data in a predetermined standard, a third parameter indicating an arrangement of pilot signals, or a fourth parameter indicating a frame length of the first frame, the selection unit selects the demodulation mode in accordance with each parameter or a combination of the parameters,
the selection unit selects the demodulation mode in accordance with a symbol position defined by the transmission parameter,
the selection unit selects an equalization mode as the demodulation mode, the equalization mode is an interpolation type mode in which frequency direction interpolation of a channel estimate estimated by time interpolation between the pilot signals is performed or a frequency direction interpolation type mode in which interpolation is performed only in a frequency direction, and
the selection unit selects the interpolation type mode for the symbol position other than at a termination of the first frame and selects the frequency direction interpolation type mode for the symbol position at the termination of the first frame.
8. A reception method of a reception device, the reception method comprising, by the reception device:
a step of receiving an OFDM (Orthogonal Frequency Division Multiplexing) signal;
a step of acquiring a transmission parameter concerning the OFDM signal contained in the OFDM signal; and
a step of selecting a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter,
wherein,
the transmission parameter contains at least a first parameter indicating that a communication mode is SISO (Single Input Single Output) or MISO (Multiple Input Single Output), a second parameter indicating presence/absence of a second frame having a different structure from a first frame as a unit of transmitting data in a predetermined standard, a third parameter indicating an arrangement of pilot signals, or a fourth parameter indicating a frame length of the first frame,
the demodulation mode is selected in accordance with each parameter or a combination of the parameters,
an equalization mode is selectedas the demodulation mode,
the equalization mode is an interpolation type mode in which frequency direction interpolation of a channel estimate estimated by time interpolation between the pilot signals is performed or a frequency direction interpolation type mode in which interpolation is performed only in a frequency direction, and
the selection unit selects the frequency direction interpolation type mode when the second parameter indicates that the second frame is present.
9. A non-transitory computer readable storage medium having stored thereon program instructions for causing a computer to function as:
a reception unit configured to receive an OFDM (Orthogonal Frequency Division Multiplexing) signal;
an acquisition unit configured to acquire a transmission parameter concerning the OFDM signal contained in the OFDM signal; and
a selection unit configured to select a demodulation mode of the OFDM signal in accordance with the acquired transmission parameter,.
wherein,
the transmission parameter contains at least a first parameter indicating that a communication mode is SISO (Single Input Single Output) or MISO (Multiple Input Single Output), a second parameter indicating presence/absence of a second frame having a different structure from a first frame as a unit of transmitting data in a predetermined standard, a third parameter indicating an arrangement of pilot signals, or a fourth parameter indicating a frame length of the first frame,
the selection unit selects the demodulation mode in accordance with each parameter or a combination of the parameters,
the selection unit selects an equalization mode as the demodulation mode,
the equalization mode is an interpolation type mode in which frequency direction interpolation of a channel estimate estimated by time interpolation between the pilot signals is performed or a frequency direction interpolation type mode in which interpolation is performed only in a frequency direction, and
the selection unit selects the frequency direction interpolation type mode when the second parameter indicates that the second frame is present.