Apparatus and method for determining signal correlation

Abstract

An apparatus and a method for determining signal correlation, the method including: inputting a first signal to a first electro-optical conversion unit, to enable the first electro-optical conversion unit to modulate to-be-modulated light according to the input first signal and to obtain a to-be-measured signal; inputting a second signal to a second electro-optical conversion unit, to enable the second electro-optical conversion unit to modulate to-be-modulated light according to the input second signal and to obtain a correlation signal; determining a product signal of the to-be-measured signal and the correlation signal via a photoelectric method or an optical method; and determining correlation of the to-be-measured signal and the correlation signal by performing an electrical average operation on the product signal. Therefore, correlation of two high-speed signals is obtained by only using a low-bandwidth electrical device without requiring use of a large-bandwidth multiplier.

Dependencies are inferred from the claim text.