Autocorrelation function factor generating method and...

Details Autocorrelation function factor generating method and... Autocorrelation function factor generating method and...

G - Physics

06

F

354/69

G06F 17/15 (2006.01)

Patent

CA 1124404

AUTOCORRELATION FUNCTION FACTOR GENERATING METHOD AND CIRCUITRY THEREFOR Abstract of the Disclosure For a delta modulated signal wave comprising a digital carrier wave modulated by an analog wave and represented accordingly as a bivalued digital data bit stream, a corre- lation function factor is generated by delaying the bit stream in time by an integral multiple of bits and accumu- lating the successive individual products over a predeter- mined number of bits of successive individual bits delayed in time and the corresponding currently appearing bits. The circuitry is extremely simple; readily procurable components only are required. A dual input exclusive OR (XOR) gating circuit is connected to the source of delta modulated signal bit stream and to an N-bit digital binary shift register also connected to the source. A stream of successive bi- valued products of the current bits and the time delayed bits over a period of N-bits is obtained from the XOR gating circuit and applied to a bidirectional digital counting circuit from which an autocorrelation function factor is delivered.

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