Ambiguity performance is a critical criterion in radar sensor design, which indicates the ambiguities arising from multiple target estimation and detection. We considered a requirement-driven selection of OFDM reference signal (RS) patterns based on ambiguity performances for bi-static sensing in integrated communication and sensing with minimal modifications of current RSs. An RS pattern with a staggering offset of a linear slope that is relatively prime to the RS comb size is suggested for standard-resolution sensing algorithms to obtain the best ambiguity performances. Moreover, an extended guard interval design is proposed to increase the maximum time delay, that is inter-symbol interference (ISI) free using post-FFT sensing algorithms. The proposed techniques are promising to extend the distance and speed without ambiguities and ISI for sensing.

翻译：摘要：模糊性能是雷达传感器设计中的关键指标，它反映了多目标估计与检测中产生的模糊性。本文基于模糊性能，在最小化现有参考信号（RS）改动的前提下，针对通感一体化中的双基地感知问题，提出了一种需求驱动的OFDM参考信号模式选择方案。建议采用与参考信号梳状尺寸互质的线性斜率交错偏移的RS模式，以通过标准分辨率感知算法获得最佳模糊性能。此外，本文提出了一种扩展保护间隔设计，利用后FFT感知算法可增加无符号间干扰（ISI）的最大时延。所提技术有望在感知过程中扩展无模糊距离与速度范围，并消除ISI干扰。