Apparatus for serially-correlating time series

An apparatus for serially-correlating two discrete time series wherein the data values of each element of the series are converted to floating-point numbers consisting of an algebraic sign, a mantissa, and an exponent to an arbitrary base. The exponents are adjusted to constrain the mantissas to fall within a narrow, substantially-constant, numerical range near unity. Variations of the exponents of the respective time series are thus representative of variations in the signal levels of the time series. The signs and exponents are then stripped from the mantissas and are serially correlated as if they were the actual data values.