Patent ID: 7881669

Claim:
A time reference point information transmitting system in which a transmitter transmits information on a time reference point to a receiver through a communication path in which a communication can be performed in a predetermined frequency band, comprising: the transmitter including a frequency-signal generating unit that generates a plurality of frequency signals communicable through the communication path, a phase adjusting unit that sets a value equal to or smaller than an inverse number of an absolute value of a difference between two frequency signals from among the frequency signals generated by the frequency-signal generating unit as a length of a time during which the communication signals are transmitted to the receiver, determines a time point at which the phases of the frequency signals coincide within a range of a set time length, defines a determined time point as the time reference point, and aligns the phases of the frequency signals based on a defined time reference point, and a transmitting unit that combines the frequency signals of which the phases are aligned by the phase adjusting unit, and transmits the combined frequency signals to the receiver by the length of the time as communication signals; and the receiver including a receiving unit that receives the communication signals transmitted from the transmitter, a phase extracting unit that extracts the phases of the frequency signals contained in the communication signals, based on the communication signals received by the receiving unit, and a time-reference-point determining unit that obtains a time point at which the phases coincide based on the phases extracted by the phase extracting unit, and determines an obtained time point as the time reference point.