Interpolating filter arrangement with non-rational ratio between

Details Interpolating filter arrangement with non-rational ratio between Interpolating filter arrangement with non-rational ratio between

1984-03-16

1986-08-05

Malzahn, David H.

Boots, shoes, and leggings

G06F 1531

Patent

active

046047204

ABSTRACT:
Interpolating time-discrete filter arrangement for increasing the sampling frequency of a time-discrete signal from f.sub.i to f.sub.u, f.sub.u not being a rational multiple of f.sub.i. For the generation of the required filter coefficients this filter arrangement comprises clock pulse generators which produce input clock pulses ki(q) at a rate f.sub.i and output clock pulses ku(n) at a rate f.sub.u. It also comprises a coefficients generator in which a deviation component d(q) is calculated which indicates the relationship between the time interval T.sub.d(q) located between an input clock pulse k.sub.i (q) and the immediately preceding or the immediately subsequent output clock pulse ku(n) and the time interval T.sub.u =1/f.sub.u between two consecutive output clock pulses ku(n). In response to this deviation component the filter coefficients generator produces W filter coefficients, the w.sup.th filter coefficient (w=0, 1, 2, 3, . . . W-1) being equal to a(d(q),w) and being defined by the expression

REFERENCES:
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patent: 4460890 (1984-07-01), Busby
Crochiere, "Further Considerations in the Design of Decimators and Interpolators", IEEE Trans. on Acoustics, Speech, and Signal Processing, vol. ASSP-24, No. 4, Aug. 1976, pp. 296-311.
Wong et al., "Commutatively & Application of Digital Interpolation Filters & Modulators", IEEE Trans. on Communications, vol. COM-28, No. 2, Feb. 1980, pp. 244-249.

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