Transmitter, receiver, transmission method, and reception method
AssigneePanasonic Intellectual Property Corporation of America
InventorPeter Klenner
Life of this patent
Estimating the term…
Abstract
A transmitter includes: a modulation circuit that modulates a data sequence using QAM by mapping the data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes; and a transmission circuit that wirelessly transmits the data sequence mapped to the four symbols through the modulation by the modulation circuit, by assigning the data sequence mapped to the four symbols through the modulation by the modulation circuit to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM).
Claims19
A transmitter, comprising:
- a modulation circuit that modulates a data sequence using asymmetric Quadrature Amplitude Modulation (QAM) by mapping the data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes;
- and
- a transmission circuit that wirelessly transmits the data sequence mapped to the four symbols through the modulation by the modulation circuit, by assigning the data sequence mapped to the four symbols through the modulation by the modulation circuit to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM).
A receiver, comprising:
- a reception circuit that receives a signal modulated using asymmetric Quadrature Amplitude Modulation (QAM) by mapping a data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes, and wirelessly transmitted by assigning the data sequence mapped to the four symbols to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM);
- and
- a demodulation circuit that demodulates the signal received by the reception circuit, using the QAM by mapping the signal received by the reception circuit to the four symbols.
A transmission method, comprising:
- modulating, with a modulation circuit, a data sequence using asymmetric Quadrature Amplitude Modulation (QAM) by mapping the data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes;
- and
- wirelessly transmitting, with a transmission circuit, the data sequence mapped to the four symbols through the modulation circuit by assigning the data sequence mapped to the four symbols through the modulation circuit to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM).
A reception method, comprising:
- receiving, with a reception circuit, a signal modulated using asymmetric Quadrature Amplitude Modulation (QAM) by mapping a data sequence to only four symbols each of which differs in phase by 90 degrees from an adjacent one of the four symbols and at least two of which have different amplitudes, and wirelessly transmitted by assigning the data sequence mapped to the four symbols to different subcarriers for Orthogonal Frequency Division Multiplexing (OFDM);
- and
- demodulating, with a demodulation circuit, the signal received by the reception circuit, using the QAM by mapping the signal received by the reception circuit to the four symbols.
Dependencies are inferred from the claim text.