发表机构
School of Computing and Artificial Intelligence, Jiangxi University of Finance and Economics（江西财经大学计算机与人工智能学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文针对以通信为中心的ISAC，提出一个面向DSP的收发器框架，通过循环前缀和脉冲成形连接物理收发器与周期模型，实现频域均衡和距离估计，并用数值实验验证。该框架统一了通信与感知的DSP处理，为随机信号ISAC系统设计提供了基础。
AI 中文摘要
以通信为中心的集成感知与通信（ISAC）直接采用随机数据承载的通信信号，同时进行信息传输和环境感知。现有研究通常以连续时间描述脉冲成形传输，或直接采用周期性离散时间感知模型，这使得连接物理收发器和周期模型的数字信号处理（DSP）操作不明确。本文针对单天线以通信为中心的ISAC，开发了一个面向DSP的收发器框架。通过调制、循环前缀（CP）插入、上采样和脉冲成形构建了一个通用发射器。对于通信接收，物理收发器链路被简化为符号速率等效线性信道，该信道在去除CP后变为循环矩阵，从而支持频域均衡。对于感知接收，从发射波形中提取高速率参考波形，并等效地表示为循环脉冲成形。接收端的CP去除将物理目标延迟转换为该参考波形的循环移位，从而产生周期匹配滤波模型及相应的距离剖面。数值结果通过目标距离估计和脉冲成形CP-OFDM在频率选择性瑞利衰落信道上的符号错误率性能验证了所开发的框架。
英文摘要
Communication-centric integrated sensing and communication~(ISAC) directly employs random data-bearing communication signals for both information transmission and environmental sensing. Existing studies generally describe pulse-shaped transmission in continuous time or directly adopt periodic discrete-time sensing models, leaving the digital signal processing~(DSP) operations connecting the physical transceiver and the periodic models unclear. This paper develops a DSP-oriented transceiver framework for single-antenna communication-centric ISAC. A common transmitter is constructed through modulation, cyclic-prefix~(CP) insertion, upsampling, and pulse shaping. For communication reception, the physical transceiver chain is reduced to a symbol-rate equivalent linear channel, which becomes circulant after CP removal and thereby supports frequency-domain equalization. For sensing reception, a high-rate reference waveform is extracted from the transmitted waveform and equivalently represented by circular pulse shaping. CP removal at the receiver then converts physical target delays into circular shifts of this reference waveform, leading to a periodic matched-filtering model and the corresponding range profile. Numerical results validate the developed framework through target range estimation and the symbol error rate performance of pulse-shaped CP-OFDM over frequency-selective Rayleigh fading channels.
