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US 2019/0319694 A1Published application
Transmission device, transmission method, receiving device and receiving method
AssigneeSun Patent Trust
InventorsMikihiro OUCHI, Yutaka MURAKAMI, Tomohiro KIMURA
Life of this patent
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Abstract
Provided is a frame configuration usable for both SISO transmission and MISO and/or MIMO transmission. A frame configurator of a transmission device configures a frame by gathering data for SISO and configures a frame by gathering data for MISO and/or MIMO data, thereby to improve the reception performance (detection performance) of a reception device.
Claims18
A transmission device to transmit orthogonal frequency-division multiplexing (OFDM) symbols, comprising:
- a frame configuration circuit configured to generate a frame such that the frame includes subframes arranged in a time axis, the subframes each consisting of first to last OFDM symbols arranged in the time axis, one of the first OFDM symbol and the last OFDM symbol being a subframe boundary symbol, the first to last OFDM symbols including a first data symbol and a second data symbol that are provided between the first OFDM symbol and the last OFDM symbol in the time axis;
- and
- a signal generation circuit connected to the frame configuration circuit to generate a transmission signal based on the frame, the transmission signal being to be transmitted through an antenna, the signal generation circuit comprising:
- a pilot insertion circuit configured to insert pilots in the first to last OFDM symbols such that (i) the first data symbol includes a first pilot corresponding to a first subcarrier, and the first data symbol does not include a second pilot corresponding to a second subcarrier, (ii) the second data symbol includes the second pilot, and the second data symbol does not include the first pilot, and (iii) the subframe boundary symbol includes at least the first pilot and the second pilot;
- and
- an IFFT circuit configured to perform Inverse Fast Fourier Transform on the first to last OFDM symbols to generate the transmission signal.
3 more elements
A transmission method for transmitting orthogonal frequency-division multiplexing (OFDM) symbols, comprising:
- generating a frame such that the frame includes subframes arranged in a time axis, the subframes each consisting of first to last OFDM symbols arranged in the time axis, one of the first OFDM symbol and the last OFDM symbol being a subframe boundary symbol, the first to last OFDM symbols including a first data symbol and a second data symbol that are provided between the first OFDM symbol and the last OFDM symbol in the time axis;
- inserting pilots in the first to last OFDM symbols such that (i) the first data symbol includes a first pilot corresponding to a first subcarrier, and the first data symbol does not include a second pilot corresponding to a second subcarrier, (ii) the second data symbol includes the second pilot, and the second data symbol does not include the first pilot;
- and (iii) the subframe boundary symbol includes at least the first pilot and the second pilot;
- performing Inverse Fast Fourier Transform (IFFT) on the first to last OFDM symbols after the pilots are inserted in the first to last OFDM symbols;
- and
- generating a transmission signal based on the frame after the IFFT is performed, the transmission signal to be transmitted through an antenna.
3 more elements
A reception device to receive orthogonal frequency-division multiplexing (OFDM) symbols, comprising:
- a receiving circuit configured to receive a transmission signal;
- an FFT circuit configured to perform Fast Fourier Transform on the transmission signal to generate a frame, the frame including subframes arranged in a time axis, the subframes each consisting of first to last OFDM symbols which are arranged in the time axis and in which pilots are inserted;
- and
- a demodulating circuit configured to detect the pilots to decode the first to last OFDM symbols, wherein
- one of the first OFDM symbol and the last OFDM symbol is a subframe boundary symbol, the first to last OFDM symbols includes a first data symbol and a second data symbol that are provided between the first OFDM symbol and the last OFDM symbol in the time axis,
- in the transmission signal, the first data symbol includes a first pilot corresponding to a first subcarrier, and the first data symbol does not include a second pilot corresponding to a second subcarrier,
- in the transmission signal, the second data symbol includes the second pilot, and the second data symbol does not include the first pilot, and
- in the transmission signal, the subframe boundary symbol includes at least the first pilot and the second pilot.
5 more elements
Dependencies are inferred from the claim text.