Correlation detection manner and the correlation detection device in delay profile measuring

摘要

PROBLEM TO BE SOLVED: To obtain the method for accelerating the calculation speed in the case of obtaining a correlation value with respect to each element wave by obtaining a propagation delay time of each element wave in a received waveform, obtaining an amplitude coefficient of each element wave obtained by this method as a correlation value, and using the value dividing a sum based on a reference sum value for the amplitude coefficient of each element wave with respect to the delay time. SOLUTION: A PN signal generator 2 receives a clock signal with a prescribed period from a clock signal generator 1 and generates a PN signal with a chip period of a clock signal period. In this case, the PN signal generator 2 outputs a PN signal used for measurement of a delayed profile in a form of a rectangular wave. The frequency of the PN signal is limited by a band limit filter 3 and the signal frequency is converted into a transmission frequency band with a mixer 5 receiving a carrier signal generated from a local oscillator 4. An output of the mixer 5 is given to a high frequency filter 6, in which arm undesired wave component is eliminated.