Receiving circuit and receiving method
View Patent ↗A receiving circuit which receives information using a multi-carrier signal comprises a phase rotation amount calculator which calculates a phase rotation amount of a multi-carrier signal included in a first frequency band according to a pilot-sub carrier included in the first frequency band, a converter which calculates a phase rotation amount of a multi-carrier signal included in a second frequency band according to the phase rotation amount of the multi carrier signal included in the first frequency band.
1. A receiving circuit which receives information using a multi-carrier signal, the receiving circuit comprising:
a phase rotation amount calculator which calculates a phase rotation amount of a multi-carrier signal included in a first frequency band according to a pilot-sub carrier included in the first frequency band;
a converter which calculates a phase rotation amount of a multi-carrier signal included in a second frequency band according to the phase rotation amount of the multi-carrier signal included in the first frequency band; and
a phase rotation amount determination unit which smoothes the phase rotation amounts and determines a correction value of the received multi-carrier signal using the phase rotation amount of the multi-carrier signal included in a first frequency band from the phase rotation amount calculator and the phase rotation amount of the multi-carrier signal included in a second frequency band from the converter.
2. The receiving circuit according to claim 1 , further comprising:
a converted phase storage which stores the phase rotation amount of the multi-carrier signal included in the second frequency band calculated by the converter.
3. The receiving circuit according to claim 1 , further comprising:
a phase rotation correction unit which corrects a phase of the multi-carrier signal included in the second frequency band according to the correction value of the received multi-carrier signal determined by the phase rotation amount determination unit.
4. The receiving circuit according to claim 1 , wherein the converter includes a conversion table memory which stores a coefficient to calculate the phase rotation amount of the multi-carrier signal included in the second frequency band.
5. The receiving circuit according to claim 2 , wherein the converter includes a conversion table memory which stores a coefficient to calculate the phase rotation amount of the multi-carrier signal included in the second frequency band.
6. The receiving circuit according to claim 2 , wherein the converted phase storage outputs calculation result of the phase rotation amount of the multi-carrier signal included in the second frequency band according to the phase rotation amount of the multi-carrier signal included in the first frequency band when the multi-carrier signal of included in the second frequency band is input.
7. A receiving method which receives information using a multi-carrier signal, the method comprising:
calculating, by a phase rotation amount calculator, a first phase rotation amount of a received multi-carrier signal in a first frequency band based on detected pilot-sub-carriers;
determining, by a multi-band controller, a frequency band of the received multi-carrier signal;
calculating, by a converter, a plurality of other phase rotation amounts corresponding to the frequency bands except for the first frequency band according to the phase rotation amount of the received multi-carrier signal in the first frequency band; and
smoothing phase rotation amounts and determining of a correction value of the received multi-carrier signal, by a phase rotation amount determination unit, using the first phase rotation amount of the received multi-carrier signal in the first frequency band from the phase rotation calculator and the other phase rotation amounts corresponding to the frequency bands from the converter.
8. The receiving method of claim 7 , further comprising:
storing the other phase rotation amounts from the converter, in a converted phase storage, of the multi-carrier signal included in the other frequency bands calculated according to the phase rotation amount of the received multi-carrier signal in the first frequency band.
9. The receiving method of claim 8 , further comprising:
performing a phase correction of the received multi-carrier signal based on the determined correction value.
10. The receiving method according to claim 7 , wherein the calculation of the other phase rotation amounts of a multi-carrier signal included in a second frequency band according to the phase rotation amount of the multi carrier signal included in the first frequency band is carried out by multiplying the phase rotation amount of the multi-carrier signal included in the first frequency by a predetermined coefficient.