Apparatus and Method for Adaptive Rotation Angle Control, Wireless Apparatus, and Computer Program

An adaptive rotation angle control method in which reception quality information and amplitude fluctuation information are provided as input information to control a rotation angle used in a rotation orthogonal code, said method comprising the steps of:

• calculating a value of a communication quality approximating equation including variables representing reception quality information, amplitude fluctuation information, and a rotation angle by substituting a rotation angle, and said reception quality information and said amplitude fluctuation information provided as said input information, into said communication quality approximating equation;
• modifying said rotation angle provided in said calculating step;
• and
• determining an optimum rotation angle based on a communication quality information which is said value of said communication quality approximating equation calculated in said calculating step.

A computer program which performs processing to control a rotation angle used in a rotation orthogonal code utilizing reception quality information and amplitude fluctuation information provided as input information, said computer program executing the steps of:

• calculating a value of a communication quality approximating equation including variables representing reception quality information, amplitude fluctuation information, and a rotation angle by substituting a rotation angle, and said reception quality information and said amplitude fluctuation information provided as said input information, into said communication quality approximating equation;
• modifying said rotation angle provided in said calculating step;
• and
• determining an optimum rotation angle based on a communication quality information which is said value of said communication quality approximating equation calculated in said calculating step.

A computer-readable storage medium storing a computer program which performs processing to control a rotation angle used in a rotation orthogonal code utilizing reception quality information and amplitude fluctuation information provided as input information, said computer program executing the steps of:

• calculating a value of a communication quality approximating equation including variables representing reception quality information, amplitude fluctuation information, and a rotation angle by substituting a rotation angle, and said reception quality information and said amplitude fluctuation information provided as said input information, into said communication quality approximating equation;
• modifying said rotation angle provided in said calculating step;
• and
• determining an optimum rotation angle based on a communication quality information which is said value of said communication quality approximating equation calculated in said calculating step.