Radio communication apparatus and radio communication method
OwnerMitsuru Uesugi, Atsushi Sumasuinventors
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Abstract
A particular data item is arranged two-dimensionally, distributed both on the frequency axis and on the time axis, by spreading in the time axis direction by means of time domain spreaders 102-1 through 102-N data converted to parallel form by an S/P section 101, and rearranging post-spreading chips on the frequency axis by shifting them step-wise in the carrier frequency upward or downward direction by means of a rearranging section 103.
Claims21
A radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- an arranger for dividing a particular data item into chip units and arranging said chip units two-dimensionally both on the frequency axis and on the time axis;
- and
- a transmitter for transmitting a multicarrier signal in which each of the divided data is assigned to carrier corresponding to the each of the divided data.
A radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- a receiver for receiving a multicarrier signal;
- and
- a restorer for restoring data, that has been divided into chip units and arranged two-dimensionally both on the frequency axis and on the time axis by a communicating partner, to a pre-division state.
A communication terminal apparatus equipped with a radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- an arranger for dividing a particular data item into chip units and arranging said chip units two-dimensionally both on the frequency axis and on the time axis;
- and
- a transmitter for transmitting a multicarrier signal in which each of the divided data is assigned to carrier corresponding to the each of the divided data.
A communication terminal apparatus equipped with a radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- a receiver for receiving a multicarrier signal;
- and
- a restorer for restoring data, that has been divided into chip units and arranged two-dimensionally both on the frequency axis and on the time axis by a communicating partner, to a pre-division state.
A base station apparatus equipped with a radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- an arranger for dividing a particular data item into chip units and arranging said chip units two-dimensionally both on the frequency axis and on the time axis;
- and
- a transmitter for transmitting a multicarrier signal in which each of the divided data is assigned to carrier corresponding to the each of the divided data.
A base station apparatus equipped with a radio communication apparatus that performs communications by combining a multicarrier modulation method and a CDMA method, said radio communication apparatus comprising:
- a receiver for receiving a multicarrier signal;
- and
- a restorer for restoring data, that has been divided into chip units and arranged two-dimensionally both on the frequency axis and on the time axis by a communicating partner, to a pre-division state.
A radio communication method that combines a multicarrier modulation method and a CDMA method, comprising the steps of:
- on the transmitting side, dividing a particular data item into chip units and arranging said chip units two-dimensionally both on the frequency axis and on the time axis, and then transmitting a multicarrier signal in which each of the divided data is assigned to carrier corresponding to the each of the divided data;
- and
- on the receiving side, receiving the multicarrier signal and restoring data, that has been arranged two-dimensionally on the transmitting side, to a pre-division state.
Dependencies are inferred from the claim text.