Transmission device and transmission method
AssigneePanasonic Intellectual Property Corporation of America
InventorsYutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi, Hiroyuki Motozuka
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Abstract
A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second preceded signal; a first pilot inserter that inserts a pilot signal into the first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the phase-changed second precoded signal; and a phase changer that applies a phase change to the phase-changed and pilot-signal-inserted second precoded signal. Δλ satisfies π/2 radians<Δλ<π radians or π radians<Δλ<3π/2 radians.
Claims5
A transmission method comprising:
- receiving, from a communication apparatus, first control information indicating whether a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) transmission scheme or an OFDM transmission scheme is to be performed;
- selecting a precoding matrix from among precoding matrices and precoding modulated symbols with the precoding matrix selected if the first control information indicates that the DFT-s-OFDM is to be performed, the precoding matrices including a first matrix according to which phase shift is performed on at least one symbol of the modulated symbols;
- and
- transmitting the modulated symbols to the communication apparatus according to the first control information.
A transmission device comprising:
- a receiver configured to receive, from a communication apparatus, first control information indicating whether a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) transmission scheme or an OFDM transmission scheme is to be performed;
- a processor configured to select a precoding matrix from among precoding matrices and precode modulated symbols with the precoding matrix selected if the first control information indicates that the DFT-s-OFDM is to be performed, the precoding matrices including a first matrix according to which phase shift is performed on at least one symbol of the modulated symbols;
- and
- a transmitter configured to transmit the modulated symbols to the communication apparatus according to the first control information.
A transmission device comprising:
- communication circuitry configured to receive, from a communication apparatus, first control information first control information indicating whether a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) transmission scheme or an OFDM transmission scheme is to be performed;
- a processor configured to:
- select a modulation scheme from among modulation schemes, the modulation schemes including π/2-shift Binary Phase-Shift Keying (BPSK) scheme;
- modulate encoded information to generate modulated symbols according to the modulation scheme selected;
- select a precoding matrix from among precoding matrices, the precoding matrices including a first matrix according to which phase shift is performed on at least one symbol of the modulated symbols;
- and
- precode the modulated symbols according to the precoding matrix selected;
- and
- the communication circuitry configured to transmit the modulated symbols precoded to the communication apparatus according to the first control information.
Dependencies are inferred from the claim text.