Patent ID: 11892556
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of generating an orthogonal radar signal based on frequency modulation, the method comprising:
a first step of generating a set of frequency-modulation waveforms;
a second step of generating a random polyphase code set;
a third step of generating a set of coded frequency-modulation waveforms through element operation between the set of frequency-modulation waveforms and the polyphase code set;
a fourth step of calculating an objective function for the set of frequency-modulation waveforms with regard to a different set of coded frequency-modulation waveforms and previous sets of coded frequency-modulation waveforms, and selecting a current polyphase code set as an optimized polyphase code set when a result of current calculation is better or smaller than a result of previous iteration; and
a fifth step of performing phase perturbation by replacing an element randomly selected in the current polyphase code set selected as the optimized polyphase code set with another admissible-phase element,
wherein the objective function is defined by a sum of a value, which is obtained by multiplying an autocorrelation sidelobe peak for the set of coded frequency-modulation waveforms by a first weighting factor value, and a value, which is obtained by multiplying a cross-correlation peak for the set of coded frequency-modulation waveform by a second weighting factor.