Title:
SYSTEM AND DEVICE FOR LEAST SQUARE ERROR INTERPOLATION
Document Type and Number:
Japanese Patent JPH01122203
Kind Code:
A
Abstract:
PURPOSE:To adapt the title system to hardware and to perform the real time processing with a simple constitution by improving the algorithm of the method of least squares to obtain a correct interpolation value. CONSTITUTION:A digital input signal xj sampled by a sampling period T is inputted to delay element arrays 1M-1-11 having a delay time T to obtain input data strings xM-x1. When a function f(t, alphai) including an undetermined coefficient alphai is expressed with a formula I and a formula II obtained by substituting it into simultaneously equations where the sum of squares is minimum is denoted as Ui, Ui is obtained by multiplication in acyclic filters 91-9N to which coefficients gij and xj read out from a coefficient storage devices 4 are inputted. Thus, the coefficient alphai is substituted into the formula I from Ui obtained in this manner to obtain an output interpolation value Y.
Inventors:
ONISHI MAKOTO
Application Number:
JP27920387A
Publication Date:
May 15, 1989
Filing Date:
November 06, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H03H17/00; H03H17/02; H03H17/06; (IPC1-7): H03H17/02
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)