2025_programme: Design of an OFDM-LFM Waveform for Underwater Acoustic Integrated Communication and Sensing
- Day: June 20, Friday
Location / Time: C. THALIA at 09:30 - 09:50
- Last minutes changes: -
- Session: 29. Underwater Communication Navigation and Positioning
Organiser(s): N/A
Chairperson(s): Angeliki Xenaki
- Lecture: Design of an OFDM-LFM Waveform for Underwater Acoustic Integrated Communication and Sensing
Paper ID: 2322
Author(s): Yanjun Liu, Wei Wang, Yujie Wang, Zhanqing Pu, Cheng Chi, Yanan Tian, Haining Huang
Presenter: Yanjun Liu
Abstract: An underwater acoustic integrated communication and sensing system enables efficient communication and high-performance detection under a unified-signal framework, which enhances spectrum utilization and reduces system complexity significantly. This technique holds great potential for applications in ocean observation, underwater communication networks and others. This paper designs a waveform based on orthogonal frequency division multiplexing - linear frequency modulation (OFDM-LFM) signals for integrated underwater communication and sensing. By optimizing subcarrier phase distribution and chirp characteristics jointly, the peak-to-average power ratio (PAPR) of the OFDM-LFM waveform is effectively reduced, achieving a 4.2 dB PAPR reduction and enhancing the power efficiency of the transmitted signal. Simulation demonstrates that in underwater acoustic communication, compared to traditional low-order modulation waveforms such as binary phase shift keying-LFM and minimum shift keying-LFM, the designed waveform exhibits higher spectral efficiency, transmission rate and bandwidth utilization. For underwater sensing, the designed waveform manifests a more concentrated main lobe of the ambiguity function, lower sidelobe levels, and superior range and velocity resolution. Through signal design and parameter optimization, the proposed waveform makes a good balance between high-rate data transmission and high-performance detection requirements under limited bandwidth constraints.
- Corresponding author: Ms Yanjun Liu
Affiliation: Institute of Acoustics, Chinese Academy of Sciences
Country: China
