Conflict and Trade-off of Waveform Uncertainty in Joint Communication and Sensing Systems
Conflict and Trade-off of Waveform Uncertainty in Joint Communication and Sensing Systems
复制标题
DOI：
10.1109/icc45855.2022.9839260
复制
发表时间：
2022-05
期刊：
影响因子：
--
通讯作者：
Husheng Li
中科院分区：
文献类型：
--
作者：
Husheng Li
在联合通信与感知（JCS）中，这两种功能被集成到同一个波形和硬件中，这大大降低了带宽和功耗。然而，通信和传感共享同一资源，存在着利益冲突。一个主要的冲突是波形的不确定性，这是必要的通信，但有害的传感。本文从通信数据传输速率和传感综合旁瓣电平的角度，分析了正交频分复用（OFDM）波形和广义平稳（WSS）波形在波形不确定性方面的冲突与权衡。数值结果表明，高阶正交幅度调制（QAM）会导致信号间距离（ISL）增大，从而降低目标识别能力，而单边高斯分布的WSS波形功率谱密度（PSD）在波形不确定性方面实现了最佳折衷。
In joint communications and sensing (JCS), the two functions are integrated into the same waveform and hardware, which substantially reduces the consumptions of bandwidth and power. However, there exist conflicts of interests between communications and sensing, when they share the same resource. One major conflict is the uncertainty of waveform that is necessary to communications but harmful for sensing. In this paper, the conflict and trade-off in the waveform uncertainty are analyzed for orthogonal frequency division multiplexing (OFDM) waveforms and wide sense stationary (WSS) waveforms, in terms of data transmission rate of communications and integrated sidelobe level (ISL) for sensing. It is shown by numerical results that high-order quadrature amplitude modulation (QAM) results in higher ISL (thus lower capability of target identification), while a single-sided Gaussian-distributed power spectral density (PSD) in WSS waveforms achieves the optimal trade-off in the waveform uncertainty.