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US 2007/0165751 A1Published application
Symbol point estimating apparatus, method, program, and recording medium
AssigneeAdvantest Corporation
InventorKenji Nowara
Life of this patent
Estimating the term…
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AssigneeAdvantest Corporation
InventorKenji Nowara
Estimating the term…
The symbol points of a received signal can be more precisely measured. A symbol point estimating apparatus, which estimates the symbol points of a received signal z(k) by deciding a time delay T between sampling points of the received signal z(k) as sampled at a sampling frequency fs and the symbol points of the received signal z(k), comprises a multiplication/sum of products output unit for outputting a sum of products Aejθ of respective products Y(n)=Z(n)R(n)* obtained by multiplying a complex conjugate R(n)* of a frequency component R(n) of an ideal signal r(k) by a frequency component Z(n) of the received signal z(k) and a sampling angular frequency Δω(=2πfs/N, where N is an error component calculation length between the ideal signal r(k) and the received signal z(k)); and a time delay determining unit for determining, based on the output of the multiplication/sum of products output unit, the time delay T such that an error component EVM between the ideal signal r(k) and the received signal z(k) is minimized.
A symbol point estimating apparatus that estimates a symbol point of a received signal by determining a time delay between a sampling point of the received signal sampled at a sampling frequency, and the symbol point of the received signal, comprising:
A symbol point estimating method that estimates a symbol point of a received signal by determining a time delay between a sampling point of the received signal sampled at a sampling frequency, and the symbol point of the received signal, comprising:
A program of instructions for execution by a computer to perform a symbol point estimating process that estimates a symbol point of a received signal by determining a time delay between a sampling point of the received signal sampled at a sampling frequency, and the symbol point of the received signal, said symbol point estimating process comprising:
A computer-readable medium having a program of instructions for execution by a computer to perform a symbol point estimating process that estimates a symbol point of a received signal by determining a time delay between a sampling point of the received signal sampled at a sampling frequency, and the symbol point of the received signal, said symbol point estimating process comprising:
Dependencies are inferred from the claim text.