A method for measuring distance and position using spread spectrum signals, and an equipment using the method

摘要

Under a multi-path environment, receive timing for the incoming wave of the minimum propagation delay time cannot be accurately measured using the prior art. By using the delay profile (202) created by delay profile creating section (102) and the first threshold value (330) received from the first threshold value calculation section (105), the first threshold value timing detection section (103) selects only the earliest receive timing exceeding the first threshold value (330), from all the timing that the correlation value in the delay profile (202) becomes a maximum. By using the receive timing and the second threshold value (331) received from the second threshold value calculation section (107), reference timing calculation section (106) selects the reference timing (208) required for calculating the receive timing for the incoming wave of the minimum propagation delay time. The timing delayed by previously set timing behind said reference timing (208) is sent from receive timing calculation section (108) as the receive timing (113) of the incoming wave of the minimum propagation delay time.