H - Electricity – 04 – B
Patent
H - Electricity
04
B
328/0.2
H04B 3/14 (2006.01) H04L 25/03 (2006.01)
Patent
CA 1066785
METHOD AND APPARATUS FOR FAST DETERMINATION OF INITIAL TRANSVERSAL EQUALIZER COEFFICIENT VALUES ABSTRACT A method for determining the initial values of the coefficients of a transversal equalizer for a synchronous data transmission system, wherein a training sequence is transmitted to allow the equalizer coefficients to be adjusted to optimum initial values. According to the method, a sequence (vi) of L elements vi, having a periodic autocorrelation function, only the first coefficient of which is not zero, is derived from a periodic binary pseudo-random sequence (ui) of L binary elements ui having a periodic autocorrelation function, the first coefficient of which is equal to L and each of the other coefficients are equal to -1. Then, the sequence (vi) is transmitted through the transmission channel and the initial values of the equali- zer coefficients are derived from the received sequence. In a pre- ferred embodiment of the invention the initial values of the equalizer coefficients are derived from the received sequence through a direct method which involves the calculation of the autocorrelation matrix of samples of the transmission channel impulse responses.
256689
International Business Machines Corporation
Na
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