Wang Qixing, Gao Peng, Xie Zhuochen, Yu Jinpei
School of Information Science and Technology, ShanghaiTech University, Shanghai 200120, China.
Innovation Academy for Microsatellites of CAS, Shanghai 201210, China.
Sensors (Basel). 2024 Oct 1;24(19):6375. doi: 10.3390/s24196375.
In response to the conflicting demands between real-time satellite communication and high-resolution synthetic aperture radar (SAR) imaging, we propose a method that aligns the data transmission rate with the imaging data volume. This approach balances SAR performance with the requirements for real-time data transmission. To meet the need for mobile user terminals to access real-time SAR imagery data of their surroundings without depending on large traditional ground data transmission stations, we developed an application system based on filter bank multicarrier offset quadrature amplitude modulation (FBMC-OQAM). To address the interference problem with SAR signals' transmission and reception, we developed a signal sequence based on spaceborne SAR echo and data transmission and reception. This system enables SAR and data transmission signals to share the same frequency band, radio frequency transmission system, and antenna, creating an integrated sensing and communication system. Simulation experiments showed that, compared to the equal power allocation scheme for subcarriers, the echo image signal-to-noise ratio (SNR) improved by 2.79 dB and the data transmission rate increased by 24.075 Mbps.
针对实时卫星通信与高分辨率合成孔径雷达（SAR）成像之间相互冲突的需求，我们提出了一种使数据传输速率与成像数据量相匹配的方法。这种方法在SAR性能与实时数据传输需求之间取得平衡。为满足移动用户终端在不依赖大型传统地面数据传输站的情况下访问其周围环境实时SAR图像数据的需求，我们开发了一种基于滤波器组多载波偏移正交幅度调制（FBMC-OQAM）的应用系统。为解决SAR信号发射和接收的干扰问题，我们基于星载SAR回波以及数据发射和接收开发了一种信号序列。该系统使SAR和数据传输信号能够共享同一频段、射频传输系统和天线，从而创建了一个集成感知与通信系统。仿真实验表明，与子载波的等功率分配方案相比，回波图像信噪比（SNR）提高了2.79 dB，数据传输速率提高了24.075 Mbps。
