Transmission apparatus, reception apparatus, transmission method, and reception method
AssigneePanasonic Intellectual Property Corporation of America
InventorsYutaka Murakami, Yasuaki Yuda
Life of this patent
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Abstract
A transmission apparatus according to the present disclosure includes a plurality of user modulated signal generators. A user #k modulated signal generator (104_k) (where k=1 to n) generates a modulated signal including reference signals for phase noise estimation (PT-RS: Reference Signal for Phase Tracking), for a plurality of reception apparatuses. A wireless unit (109_A, 109_B) transmits the generated modulated signal. A correction coefficient of transmission power for the reference signals is associated with a pattern of a sequence used as the reference signals, on a one-to-one basis.
Claims10
A base station apparatus, comprising:
- a downlink signal generation circuit, which, in operation,
- generates a downlink signal including a first data signal for first reception apparatus mapped on a first set of subcarriers and a second data signal for a second reception apparatus mapped on a second set of subcarriers,
- determines whether to map a first Reference Signal for Phase Tracking (PT-RS) to the first data signal based on a first Modulation and Coding Scheme (MCS) configured for the first data signal, wherein in a case where Phase Shift Keying (PSK) is used as a modulation scheme of the first MCS, the downlink signal generation circuit determines to not map the first PT-RS,
- determines whether to map a second PT-RS to the second data signal based on a second MCS configured for the second data signal, wherein in a case where PSK is used as a modulation scheme of the second MCS, the downlink signal generation circuit determines to not map the second PT-RS,
- responsive to determining to map the first PT-RS, maps the first PT-RS to the first data signal for the first reception apparatus, and
- responsive to determining to map the second PT-RS, maps the second PT-RS to the second data signal for the second reception apparatus;
- and
- a transmitter, which is coupled to the downlink signal generation circuit and which, in operation, transmits the downlink signal.
A transmission method performed by a base station, comprising:
- generating a downlink signal including a first data signal for first reception apparatus mapped on a first set of subcarriers and a second data signal for a second reception apparatus mapped on a second set of subcarriers;
- determining whether to map a first Reference Signal for Phase Tracking (PT-RS) to the first data signal based on a first Modulation and Coding Scheme (MC S) configured for the first data signal, wherein in a case where Phase Shift Keying (PSK) is used as a modulation scheme of the first MCS, the determining includes determining to not map the first PT-RS;
- determining whether to map a second PT-RS to the second data signal based on a second MCS configured for the second data signal, wherein in a case where PSK is used as a modulation scheme of the second MCS, the determining includes determining to not map the second PT-RS;
- responsive to determining to map the first PT-RS, mapping the first PT-RS to the first data signal for the first reception apparatus;
- responsive to determining to map the second PT-RS, mapping the second PT-RS to the second data signal for the second reception apparatus;
- and
- transmitting the downlink signal.
Dependencies are inferred from the claim text.