A RadBackCom Approach to Integrated Sensing and Communication: Waveform Design and Receiver Signal Processing

RadBackCom 集成传感和通信方法：波形设计和接收器信号处理

• 批准号: 2335765
• 负责人: Xiaodong Wang
• 金额: $ 45万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-09-01 至 2027-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2335765&HistoricalAwards=false
• 关键词: RadBackCom; Approach; Integrated; Sensing; Communication

The emerging Internet of Things (IoT) and perceptive mobile networks are envisioned to provide broadband connectivity among a sheer number of connected users/devices and ubiquitous sensing capabilities. The integrated communication and sensing (ISAC) architectures achieve spectrum sharing between communications and sensing by encompassing just one active radio transmitter and two different receiving chains to accommodate the two functions. On the other hand, a promising technology for implementing low-power and low-cost communication is ambient backscatter communication (ABC), where a tag, often not connected to a battery or a power grid, can deliver a message to a reader by simply reflecting and modulating an incident ambient signal emitted by the radio frequency (RF) emitter of an existing legacy system. This project addresses various design aspects of a new ISAC architecture, called the RadBackCom system, which consists of a legacy radar system, and a backscatter communication system with the carrier signal being the radar clutter echoes. This research will significantly advance the state-of-the-art in the fields of ISAC and ABC. Practical use cases may include the exploitation of ground-based radars for air/road traffic control, environmental/weather monitoring, collision avoidance, intrusion detection, and radio imaging.Specifically, data transmission schemes will be developed when the legacy system is either a pure radar system or a dual functional radar communication (DFRC) system. When there are multiple tags transmitting data, transceiver schemes for both pilot-based sourced systems and pilot-free unsourced systems will be developed. Further, when the legacy system is assisted by a reflecting intelligent surface (RIS), several scenarios will be considered where the RIS also plays the role of an information-bearing tag, a one-bit reader, and a helper, respectively, in the RadBackCom system, and the corresponding solutions will be developed. The proposed approaches exploit an array of advanced techniques including compressed sensing, low-rank processing, simulation-based optimization, algebraic coding theory, iterative decoding, and deep neural networks, and will bring significant innovations to the theory and applications of both ISAC and ABC. Both a realistic simulator and a USRP software-defined radio testbed will be developed to validate the proposed algorithms.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

设想新兴的物联网（IoT）和知名移动网络可以在众多连接的用户/设备和无处不在的传感功能之间提供宽带连接。集成的通信和传感（ISAC）体系结构通过仅包含一个主动无线电发射器和两个不同的接收链来容纳两个功能，从而实现了通信和传感之间的频谱共享。另一方面，实施低功率和低成本通信的有前途的技术是环境反向散射通信（ABC），在该标签中，通常与电池或电网连接连接的标签可以通过简单地反映和调节现有遗产系统发射器发射的发射器（RF）发射的事件环境信号来向读者传达信息。该项目介绍了新的ISAC体系结构的各个设计方面，称为Radbackcom系统，该系统由旧版雷达系统组成，而背面通信系统则具有载体信号为雷达杂物的回声。这项研究将大大推动ISAC和ABC领域的最新研究。实际用例可能包括对空气/道路交通管制，环境/天气监测，避免碰撞，入侵检测和无线电成像的开发。当时，当传统系统是纯粹的雷达系统或双重功能雷达通信（DFRC）系统时，将制定数据传输方案。当有多个传输数据的标签时，将开发基于试点的来源系统和无试验的无源系统的收发器方案。此外，当传统系统得到反射智能表面（RIS）的协助时，将考虑几种情况，其中RI还将在Radbackcom系统中分别扮演信息带标签，一位读取器和助手的角色，并开发相应的解决方案。提出的方法利用了一系列先进技术，包括压缩感应，低级别处理，基于模拟的优化，代数编码理论，迭代解码和深层神经网络，并将为ISAC和ABC的理论和应用带来重大创新。将开发一个现实的模拟器和USRP软件定义的无线电测试台，以验证拟议的算法。该奖项反映了NSF的法定任务，并认为使用基金会的知识分子优点和更广泛的影响审查标准，被认为值得通过评估。