Method of generating radar signal and computing device for performing the method

A method of generating a radar signal, the method comprising:

• determining an orthogonal radar signal set comprising nonlinear frequency modulation (NLFM)-based orthogonal radar signals using a target polyphase-code set comprising a plurality of polyphase-code sequences and an NLFM waveform set comprising a plurality of NLFM waveforms, based on a target nonlinearity vector;
• determining an objective function comprising an autocorrelation function of each orthogonal radar signal of the orthogonal radar signal set and a cross-correlation function between two arbitrary orthogonal radar signals included in the orthogonal radar signal set;
• and
• determining whether to redetermine the orthogonal radar signal set in accordance with an output of the objective function for the two arbitrary orthogonal radar signals selected from the orthogonal radar signal set.

A computing device comprising:

• one or more processors;
• and
• a memory configured to load or store a program executed by the one or more processors,
• wherein the program comprises instructions that cause the one or more processors to perform operations of generating a nonlinear frequency modulation (NLFM) waveform set composed of a plurality of NLFM waveforms, based on a target nonlinearity vector among a plurality of nonlinearity vectors, generating a target polyphase-code set composed of a plurality of polyphase-code sequences based on an orthogonal phase, determining an orthogonal radar signal set composed of NLFM-based orthogonal radar signals using the NLFM waveform set generated based on the target nonlinearity vector and the target polyphase-code set, and redetermining the orthogonal radar signal set such that orthogonality is maximized by minimizing an objective function composed of an autocorrelation function of each orthogonal radar signal constituting the orthogonal radar signal set and a cross-correlation function between two arbitrary orthogonal radar signals constituting the orthogonal radar signal set.