Data processing device and radar device

A data processing device comprising:

• a processor configured to
• operate as an infinite impulse response (IIR) filter a data sequence that is inputted and to output a data sequence in which a low frequency component is reduced as compared with the data sequence that is inputted, the low frequency component being a component varying at a low frequency;
• input data included in an input data sequence to the IIR filter sequentially from a head or a tail of the input data sequence, the input data sequence being inputted from outside, and being a sequence of data at time points of a predetermined first number, the time points of the first number being arranged in succession with a predetermined time interval;
• obtain a value of an internal state variable of the IIR filter when a same datum as a first datum is inputted to the IIR filter an infinite number of times, the first datum being a datum in the data sequence to be inputted first to the IIR filter;
• set the value of the internal state variable obtained by the processor to the internal state variable of the IIR filter before the processor inputs the first datum to the IIR filter;
• and
• output the data sequence outputted from the IIR filter to the outside.

A data processing device, comprising:

• an infinite impulse response (IIR) filter to process a data sequence that is inputted and to output a data sequence in which a low frequency component is reduced as compared to the sequence that is inputted, the low frequency component being a component varying at a low frequency;
• a processor configured to
• calculate an approximate line approximating a temporal change of an input data sequence being a sequence of data at time points of a predetermined first number, the time points of the first number being arranged in succession with a predetermined time interval, the input data sequency being inputted from outside;
• extrapolate the approximate line to a head or a tail of the input data sequence and to generate a virtual data sequence being a sequence of data representing values on the extrapolated approximate line at time points of a predetermined second number, the time points of the second number being arranged in succession with the time interval, and including a time point being adjacent to the input data sequence;
• generate a processed data sequence being a data sequence in which the virtual data sequence is connected to the input data sequence on a side where the approximate line of the input data sequence is extrapolated;
• input data included in the processed data sequence to the IIR filter sequentially;
• and
• output the data sequence outputted from the IIR filter to the outside.

A data processing device comprising:

• an infinite impulse response (IIR) filter to process a data sequence that is inputted and to output a data sequence in which a low frequency component is reduced as compared with the data sequence that is inputted, the low frequency component being a component varying at a low frequency;
• a processor configure to:
• input data included in an input data sequence to the IIR filter sequentially from a head or a tail of the input data sequence, the input data sequence being inputted from outside, and being a sequence of data at time points of a predetermined first number, the time points of the first number being arranged in succession with a predetermined time interval;
• obtain a value of an internal state variable of the IIR filter when a same datum as a first datum is inputted to the IIR filter an infinite number of times, the first datum being a datum in the data sequence to be inputted first to the IIR filter;
• set the value of the internal state variable obtained by the processor to the internal state variable of the IIR filter before the processor inputs the first datum to the IIR filter;
• and
• output the data sequence outputted from the IIR filter to the outside.