Abstract
In the multiple-input multiple-output (MIMO) sonar system, realizing the ideal orthogonality of emission signals is difficult because it requires the lowest possible cross-correlation peak level (CPL) and autocorrelation side-lobe peak level (ASPL) simultaneously among transmitted waveforms. Analysis shows that high ASPL exists in the traditional orthogonal frequency division multiplexing linear frequency modulation (OFDM-LFM) waveform. Two new design plans for waveform structure, namely, optimizing subpulse frequency modulation bandwidth and frequency modulation time width, are proposed by adopting the idea of signal segmentation design to solve the aforementioned problem and optimize the LFM signal structure of each transmitting array element. Therefore, the degree of freedom of the transmitted signals is increased to ensure the easy generation of the waveform. Simulation results show that the waveforms designed in the two abovementioned methods have lower ASPL and CPL compared with the traditional OFDM-LFM waveform.
| Translated title of the contribution | MIMO sonar waveform design based on correlation interference suppression |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1510-1518 |
| Number of pages | 9 |
| Journal | Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University |
| Volume | 44 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2023 |