Apparatus and method for tracking sampling clock in multi-carrier communication system
AssigneeRealtek Semiconductor Corp.
InventorsKuo-Ming Wu, Der-Zheng Liu
Life of this patent
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Abstract
An apparatus and method for tracking a sampling clock are disclosed. The apparatus includes a compensating circuit compensating phases of a first and a second received symbols according to a compensating signal and thereby generating a first and a second compensated symbols; a data removal circuit removing a first predetermined transmitted data from the first compensated symbol, and a second predetermined transmitted data from the second compensated symbol and thereby generating a first and a second data removal symbols; and a computing circuit generating a sampling clock offset according to the first and the second data removal symbols, and adjusting the sampling clock signal according to the sampling clock offset.
Claims17
An apparatus for compensating a sampling clock offset of a sampling clock in a multi-carrier communication system, the sampling clock being used for sampling a plurality of received symbols, the apparatus comprising:
- a compensating circuit compensating a first and a second received symbols according to a compensating signal and thereby generating a first and a second compensated symbols, wherein the first and the second received symbols are corresponding to a first and a second sub-carriers, respectively;
- a data removal circuit, coupled to the compensating circuit, removing a first predetermined transmitted data from the first compensated symbol of the first sub-carrier, and a second predetermined transmitted data from the second compensated symbol of the second sub-carrier and thereby generating a first and a second data removal symbols, respectively;
- and
- a computing circuit, coupled to the data removal circuit, calculating the sampling clock offset according to the first and the second data removal symbols, generating a sampling clock signal according to the sampling clock offset, and providing the compensating signal for the compensating circuit according to the sampling clock offset.
A method for compensating a sampling clock offset of a sampling clock in a multi-carrier communication system, the sampling clock being used for sampling a plurality of received symbols, the method comprising:
- generating a first and a second compensated symbols by compensating a first and a second received symbols according to a compensating signal, wherein, the first and the second received symbols are corresponding to a first and a second sub-carriers, respectively;
- respectively removing a first and a second predetermined transmitted data from the first and the second compensated symbols of the first and the second sub-carriers, and thereby generating a first and a second data removal symbols, respectively;
- calculating the sampling clock offset according to the first and the second data removal symbols;
- and
- utilizing a sampling clock signal generator for receiving the sampling clock offset and generating a sampling clock signal according to the sampling clock offset;
- and utilizing a compensating signal generator for providing the compensating signal according to the sampling clock offset.
Dependencies are inferred from the claim text.