Signal specification identification apparatus, control circuit, and program storage medium

A control circuit for controlling a signal specification identification apparatus,

• the control circuit causing the signal specification identification apparatus to perform:
• estimating a transmission rate of a received signal;
• performing sampling frequency conversion on the received signal;
• calculating a probability corresponding to each of a plurality of candidates for a specification of the received signal, using a signal after the sampling frequency conversion;
• selecting a candidate from among the plurality of candidates using the respective probabilities of the candidates calculated, and calculating reliability corresponding to a selected candidate that is the candidate selected;
• making a determination on whether to perform processing to output the selected candidate as an identification result or perform the sampling frequency conversion again, based on the reliability;
• and
• changing a parameter indicating a ratio of the sampling frequency conversion when it is determined in the determination that the sampling frequency conversion is to be performed again, wherein
• the control circuit controls the signal specification identification apparatus such that in the sampling frequency conversion, in initial sampling frequency conversion, the sampling frequency conversion is performed such that a sampling frequency after the sampling frequency conversion becomes twice or more the transmission rate estimated in the transmission rate estimation, and when the parameter is changed, the sampling frequency conversion is performed according to the changed parameter, and
• the control circuit causes the signal specification identification apparatus to repeat the changing the parameter, the sampling frequency conversion, the calculating the probability, the reliability calculation, and the making the determination until it is determined that the processing to output the selected candidate as the identification result is to be performed.

A non-transitory computer readable medium to store a program for controlling a signal specification identification apparatus,

• the program causing the signal specification identification apparatus to perform:
• estimating a transmission rate of a received signal;
• performing sampling frequency conversion on the received signal;
• calculating a probability corresponding to each of a plurality of candidates for a specification of the received signal, using a signal after the sampling frequency conversion;
• selecting a candidate from among the plurality of candidates using the respective probabilities of the candidates calculated, and calculating reliability corresponding to a selected candidate that is the candidate selected;
• making a determination on whether to perform processing to output the selected candidate as an identification result or perform the sampling frequency conversion again, based on the reliability;
• and
• changing a parameter indicating a ratio of the sampling frequency conversion when it is determined in the determination that the sampling frequency conversion is to be performed again, wherein
• the program controls the signal specification identification apparatus such that in the sampling frequency conversion, in initial sampling frequency conversion, the sampling frequency conversion is performed such that a sampling frequency after the sampling frequency conversion becomes twice or more the transmission rate estimated in the transmission rate estimation, and when the parameter is changed, the sampling frequency conversion is performed according to the changed parameter, and
• the program causes the signal specification identification apparatus to repeat the changing the parameter, the sampling frequency conversion step, the calculating the probability, the reliability calculation, and the making the determination until it is determined that the processing to output the selected candidate as the identification result is to be performed.