H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/73
H04L 1/00 (2006.01) H04L 7/00 (2006.01) H04L 7/02 (2006.01) H04L 7/033 (2006.01)
Patent
CA 1242502
13 ABSTRACT: "Arrangement for receiving digital data comprising an arrangement for adaptive rate recovery." A digital data receiving arrangement, which adapts itself to channel variations of a transmission system, comprises an adaptive receiver stage (11), having an adaptive equalizer and at least one sampler, and pro- ducing, at a certain rate, complex samples Yk from the input signal x(t), a decision circuit (14) supplying de- tected complex samples ak and an adaptive rate recovery circuit (12) determining the optimal sampling instant by minimizing a quadratic function J which represents the difference between yk and ak. The adaptive rate recovery circuit comprises means (121) for shaping a primary clock signal in accordance with a secondary clock signal, whose period is twice the period of the primary clock and whose consecutive ascending edges are spaced in time by T1 and T2, said secondary clock producing alternately two sampling instants ? and ? + .DELTA.?. By minimizing the function J, on the basis of the difference determined for two instants ? k and ?k + .DELTA.?, the control of the rate recovery is defined for the consecutive sampling instants ?k and ?k+1.
492135
Desperben Lydie
Sari Hikmet
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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