| 摘要 |
In a correlation arithmetic system adapted to detect a relative difference between two functions, an operation is simplified. This makes it possible to perform the operation with a small scale of hardware and also with great accuracy. There is adopted an operation g*h instead of the "product" in the correlation arithmetic operation. There is disclosed an arithmetic unit in which two numeral values +E,uns a+EE and +E,uns b+EE are inputted, and the two numerical values +E,uns a+EE and +E,uns b+EE are subjected to a predetermined operation process, so that a numerical value +E,uns c+EE representative of an operation result is derived. The arithmetic unit has an absolute value operation unit for evaluating an absolute value |c| of the numerical value +E,uns c+EE , and a sign operation unit for evaluating a sign "sing (c)" of the numerical value +E,uns c+EE .
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