Prediction filter

Details Prediction filter Prediction filter

1992-07-02

1999-04-20

Malzahn, David H.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

708319, G06F 1710

Patent

active

058954791

ABSTRACT:
The present invention relates to a prediction filter that estimates the next sampled value from previously sampled values, and which provides an improved prediction filter that makes a prediction with little error, even for an input signal containing a frequency component close to one-half the sampling frequency. Concatenated delay circuits delay sampled values by a sampling time interval (T). Coefficient circuits multiply the outputs of the delay circuits by a certain value, and an adder sums the outputs of the coefficient circuits. Sampled values at time t=T, 0, -T, -2T, . . . are assumed to be y.sub.1, y.sub.0, y.sub.-1, y.sub.2, . . . and a predicted value at t=T to be<y.sub.1 >. These are used to generate new variables<y1>=y.sub.0, y.sub.0 =y.sub.-1, y.sub.-1 =y.sub.-2, . . . The new variables are then substituted into first- and second-degree prediction equations to produce a predicted value<y.sub.1 >, and the coefficient of each term of the equation for<y.sub.1 > is used as the multiplication factor of each coefficient circuit.

REFERENCES:
patent: 4691293 (1987-09-01), Conboy
patent: 4841463 (1989-06-01), Mehrgardt et al.
patent: 4953118 (1990-08-01), Gockler
IEEE Transactions on Acoustics, Speech and Signal Processing, vol. 28, No. 5, Oct. 1980, New York.

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