论文标题
集成感应和通信与延迟对齐调制
Integrated Sensing and Communication with Delay Alignment Modulation
论文作者
论文摘要
最近已经提出了延迟比对调制（DAM），以实现符号间干扰（ISI） - 无单载波（SC）通信，而无需依赖复杂的通道均衡。大坝的关键思想是在发射器侧预先引入故意的符号延迟，以便所有多路信号组件都可以同时到达接收器并进行建设性地叠加，而不是造成有害的ISI。与经典的正交频分多路复用（OFDM）变速箱相比，大坝具有几个吸引人的优势，包括低峰值与平均功率比（PAPR）和多普勒频移的高公差，这使大坝也吸引了雷达感测。因此，在本文中，研究了大坝的新兴综合感应和通信（ISAC）设置。我们首先为无ISI通信和雷达传感得出输出信噪比（SNR），然后为Dam-ISAC提出了有效的波束形式设计，以最大程度地提高通信SNR，同时保证感应性能。开发了ISAC的DAM与OFDM的比较分析，并揭示了DAM可以实现更高的传感SNR和较大的多普勒频率估计。提供了模拟结果，以显示DAM对ISAC的巨大潜力
Delay alignment modulation (DAM) has been recently proposed to enable inter-symbol interference (ISI)-free single-carrier (SC) communication without relying on sophisticated channel equalization. The key idea of DAM is to pre-introduce deliberate symbol delays at the transmitter side, so that all multi-path signal components may arrive at the receiver simultaneously and be superimposed constructively, rather than causing the detrimental ISI. Compared to the classic orthogonal frequency division multiplexing (OFDM) transmission, DAM has several appealing advantages, including low peak-to-average-power ratio (PAPR) and high tolerance for Doppler frequency shift, which makes DAM also appealing for radar sensing. Therefore, in this paper, DAM is investigated for the emerging integrated sensing and communication (ISAC) setup. We first derive the output signal-to-noise ratios (SNRs) for ISI-free communication and radar sensing, respectively, and then propose an efficient beamforming design for DAM-ISAC to maximize the communication SNR while guaranteeing the sensing performance. The comparison analysis of DAM versus OFDM for ISAC is developed, and it is revealed that DAM enables higher sensing SNR and larger Doppler frequency estimation. Simulation results are provided to show the great potential of DAM for ISAC
