Receiving apparatus, frequency deviation calculating method, and medium storing computer program therein

A frequency deviation calculating method, comprising:

• selecting a line that is closest to a coordinate point in a solution space formed of equally-spaced parallel lines derived based on a first time interval and a second time interval in a coordinate space in which first phase rotation at the first time interval of a first reference signal included in a reception signal of a first channel is defined as a first axis and second phase rotation at the second time interval of a second reference signal included in a reception signal of a second channel is defined as a second axis, the coordinate point being represented by a first observation value of the first phase rotation and a second observation value of the second phase rotation;
• acquiring parameters corresponding to the selected line from parameters corresponding to the individual lines in the solution space;
• and
• estimating, based on the acquired parameters, the first observation value, and the first time interval or the acquired parameters, the second observation value, and the second time interval, frequency deviations of the reception signals.

A computer-readable recording medium having stored therein a program for causing a computer to execute a frequency deviation calculating process, the process comprising:

• selecting a line that is closest to a coordinate point in a solution space formed of equally-spaced parallel lines derived based on a first time interval and a second time interval in a coordinate space in which first phase rotation at the first time interval of a first reference signal included in a reception signal of a first channel is defined as a first axis and second phase rotation at the second time interval of a second reference signal included in a reception signal of a second channel is defined as a second axis, the coordinate point being represented by a first observation value of the first phase rotation and a second observation value of the second phase rotation;
• acquiring parameters corresponding to the selected line from parameters corresponding to the individual lines in the solution space;
• and
• estimating, based on the acquired parameters, the first observation value, and the first time interval or the acquired parameters, the second observation value, and the second time interval, frequency deviations of the reception signals.