Wireless communication system and communication apparatus
AssigneeMitsubishi Electric Corporation
InventorAkihiro Okazaki
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Abstract
A data-transmission-side communication apparatus includes a mapping unit that executes a mapping for a data sub-carrier based on a multipath delay time in a transmission path and a guard-band adding unit that changes an amount of a guard band to be added to a signal on the data sub-carrier depending on information on the guard band obtained based on the multipath delay time. A data-reception-side communication apparatus includes an equalizing unit that suppresses a multipath exceeding a guard interval based on the information on the guard band and a demapping unit that executes a demapping for an equalized signal based on the multipath delay time.
Claims14
A radio communication system employing a multi-carrier modulation/demodulation method, the radio communication system comprising:
- a data-transmission-side communication apparatus including
- a mapping unit that executes a mapping process with respect to a data sub-carrier based on a multipath delay time in a transmission path obtained by a predetermined estimating process, and
- a guard-band adding unit that changes a number of guard bands to be added to a signal on the data sub-carrier depending on information on the guard band obtained based on the multipath delay time such that the number of guard bands is a function of the multipath delay time obtained by the predetermined estimating process;
- and
- a data-reception-side communication apparatus including
- an equalizing unit that suppresses a multipath exceeding a guard interval or suppresses the multipath in a case where the guard interval is not added, based on the information on the guard band obtained based on the multipath delay time, and
- a demapping unit that executes a demapping process with respect to an equalized signal based on the multipath delay time,
- wherein the guard band is a sub-carrier whose transmitting content is known to the data-reception-side communication apparatus.
A data-transmission-side communication apparatus employing a multi-carrier modulation/demodulation method, the data-transmission-side communication apparatus comprising:
- a mapping unit that executes a mapping process with respect to a data sub-carrier based on a multipath delay time in a transmission path;
- and
- a guard-band adding unit that changes a number of guard bands to be added to a signal on the data sub-carrier depending on information on the guard band obtained based on the multipath delay time such that the number of guard bands is a function of the multipath delay time obtained by a predetermined estimating process,
- wherein the guard band is a sub-carrier whose transmitting content is known to a data reception side communication apparatus.
A data-reception-side communication apparatus employing a multi-carrier modulation/demodulation method, the data-reception-side communication apparatus comprising:
- an equalizing unit that suppresses a multipath exceeding a guard interval or suppresses the multipath in a case where the guard interval is not added, based on information on a guard band obtained based on a multipath delay time in a transmission path;
- and
- a demapping unit that executes a demapping process with respect to an equalized frequency signal based on the multipath delay time,
- wherein the guard band is a sub-carrier whose transmitting content is known to the data-reception-side communication apparatus.
Dependencies are inferred from the claim text.