Adaptive predicting circuit using a lattice filter and a corresp

Details Adaptive predicting circuit using a lattice filter and a corresp Adaptive predicting circuit using a lattice filter and a corresp

1981-04-10

1983-06-21

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 30, H04B 1204

Patent

active

043897266

ABSTRACT:
An adaptive predicting circuit comprises a lattice filter with N identical cells each having four accesses. The first and second accesses of a cell are respectively connected to the third and fourth accesses of the preceding cell. Each cell comprises a circuit with a delay of one sampling time and two multipliers each having two inputs, one receiving a signal and the other a multiplication coefficient k.sub.m (t). The coefficient k.sub.m (t) is supplied to the multipliers. The adaptive predicting circuit also comprises an adder having N inputs respectively connected to the N cells and one output supplying a prediction signal. The coefficient k.sub.m (t) is supplied by a circuit for the sequential adaptation of the coefficient k.sub.m (t) inherent to each cell. The adaptation circuit has four inputs respectively connected to the first access of the cell, to the output of the delay circuit, and to the third and fourth accesses.

REFERENCES:
patent: 3502986 (1970-03-01), Lucky
patent: 4144543 (1979-03-01), Koga

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