Transmitter, communication system and transmission method
AssigneeSharp Kabushiki Kaisha
InventorsYasuhiro Hamaguchi, Kimihiko Imamura
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Abstract
A transmitter employing an OFDM system, including a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers modulated by a data symbol or a known symbol, a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter, and a scheduling portion which determines an existence of phase rotation.
Claims14
A transmitter employing an OFDM system, comprising:
- a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
- a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter;
- and
- an allocating portion which allocates a plurality of groups to a receiver,
- wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero.
A transmitter employing an OFDMA system which uses a frequency band that is constituted by a plurality of subchannels, comprising:
- a phase rotating portion which gives a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
- a rotation amount determining portion which sets a phase rotation for each antenna set or each transmitter;
- and
- a scheduling portion which sorts a data to a subchannel and determines an existence of the phase rotation.
A transmission method employing an OFDM system, comprising the steps of:
- giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
- determining the phase rotation amount for each antenna set or each transmitter, wherein the same phase rotation amount given to a first group configured with a plurality of consecutive subcarriers is a phase rotation amount equal to zero;
- allocating a plurality of groups to a receiver;
- and
- transmitting signal added with the phase rotation in addition to modulation.
A transmission method employing an OFDMA system, comprising the steps of:
- giving a same phase rotation amount to each group configured with a plurality of consecutive subcarriers;
- determining the phase rotation amount for each antenna set or each transmitter;
- determining an existence of a phase rotation;
- and
- transmitting signal added with the existence of the phase rotation to the modulation and the phase rotation.
Dependencies are inferred from the claim text.