SNR IMPROVEMENT CIRCUIT, SYNCHRONIZATION INFORMATION DETECTION CIRCUIT, COMMUNICATION DEVICE, SNR IMPROVEMENT METHOD, AND SYNCHRONIZATION INFORMATION DETECTION METHOD

摘要

Provided is a technique that can, e.g., improve the packet catch rate when applied to a communication device. An SNR improvement circuit (4) for improving the SNR of an input signal includes a delay unit (50) for delaying the input signal and generating one or more delay signals, and an adder (60) for adding the one or more delay signals and the pre-delayed input signal. The input signal includes a period signal in which the same signal is repeated a predetermined number of times at a predetermined period. The delay unit (50) generates the one or more delay signals with a delay time that is a-fold the length of the predetermined period (where a is a natural number and is set to different values for two or more delay signals).