Patent ID: 8345734

Claim:
A method for estimating a symbol time error in a broadband transmission system, comprising: determining a timing error signal of an input-signal of a discrete Fourier-transformation block in a data symbol stream on the basis of intersymbol correlation using a predetermined period in each received symbol; selecting as the predetermined period a number of samples of different useful data parts of a symbol; determining a time error value (ε) based on the intersymbol correlation of the selected samples of the different useful data parts of the symbol; wherein before performing the discrete Fourier-transformation of the selected number of samples: buffering a first vector of samples of the end of a preceding symbol; buffering a second vector of samples of the middle part of the preceding symbol; multiplying, using element-wise complex-conjugate multiplication, the first vector with a corresponding vector from a time shifted vector of an actual symbol; multiplying, using element-wise complex conjugate multiplication, the second vector with a corresponding vector from a time shifted vector of the actual symbol; calculating a first averaged sum-signal of the element-wise complex-conjugate multiplied first vector; calculating a second averaged sum-signal of the element-wise complex-conjugate multiplied second vector; and calculating the time error value based on difference between the real part of the first averaged sum-signal and the real part of the second averaged sum-signal.