Orthogonal modulation device, method, program, recording medium, and modulation device

An orthogonal modulation method comprising:

• an adding step of outputting a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal conversion step of mixing the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifting step of outputting a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplying step of multiplying the converted signal by the phase shifted local signal;
• a correlating step of obtaining a correlation between an output from said phase shifted local signal multiplying step and the pseudo noise;
• and
• an error measurement step of measuring an error of said user signal based on an output from said correlating step.

A program of instructions for execution by a computer to perform an error measurement process of an orthogonal modulation device having:

• an adding means that outputs a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal conversion means that mixes the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifting means that outputs a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplying means that multiplies the converted signal by the phase shifted local signal;
• and a correlating means that obtains a correlation between an output from said phase shifted local signal multiplying means and the pseudo noise, said error measurement process comprising:
• an error measurement step of measuring an error of said user signal based on an output from said correlating means.

A computer-readable medium having a program of instructions for execution by a computer to perform an error measurement process of an orthogonal modulation device having:

• an adding means that outputs a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal conversion means that mixes the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifting means that outputs a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplying means that multiplies the converted signal by the phase shifted local signal;
• and a correlating means that obtains a correlation between an output from said phase shifted local signal multiplying means and the pseudo noise, said error measurement process comprising:
• an error measurement step of measuring an error of said user signal based on an output from said correlating means.

An orthogonal modulation device comprising:

• an adder that outputs a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal converter that mixes the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifter that outputs a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplier that multiplies the converted signal by the phase shifted local signal;
• and
• a correlator that obtains a correlation between an output from the phase shifted local signal multiplier and the pseudo noise.

A program of instructions for execution by a computer to perform an error measurement process of an orthogonal modulation device having:

• an adder that outputs a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal converter that mixes the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifter that outputs a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplier that multiplies the converted signal by the phase shifted local signal;
• and a correlator that obtains a correlation between an output from the phase shifted local signal multiplier and the pseudo noise, the error measurement process comprising:
• measuring an error of the user signal based on an output from the correlator.

A computer-readable medium having a program of instructions for execution by a computer to perform an error measurement process of an orthogonal modulation device having:

• an adder that outputs a pseudo noise superimposed signal obtained by adding a pseudo noise to a user signal;
• a signal converter that mixes the pseudo noise superimposed signal with a local signal at a predetermined local frequency, and outputs a converted signal;
• a phase shifter that outputs a phase shifted local signal obtained by shifting the phase of the local signal;
• a phase shifted local signal multiplier that multiplies the converted signal by the phase shifted local signal;
• and a correlator that obtains a correlation between an output from the phase shifted local signal multiplier and the pseudo noise, the error measurement process comprising:
• measuring an error of the user signal based on an output from correlator.