脉冲雷达-蜂窝共存中导频干扰的概率：解调和有限CSI反馈的基本见解
Probability of Pilot Interference in Pulsed Radar-Cellular Coexistence: Fundamental Insights on Demodulation and Limited CSI Feedback
摘要：
该文研究了一种基于导频辅助解调、统计信道状态信息（S-CSI）估计和有限反馈机制的双脉冲雷达-蜂窝频谱共享方案。在一个实际的系统模型下，推导出在有限的CSI估计窗口中至少有指定数量的导频信号被雷达脉冲训练干扰的概率的上界和下界。精确的概率也来自重要的特殊情况下，揭示操作制度的下限实现。利用这些结果，本文（a）提供了对精确相干符号解调的导频干扰最小化方案的见解，以及（b）证明了导频辅助方法在宽范围的雷达重复间隔内无法准确估计脉冲雷达干扰信道的S-CSI。
英文摘要：
This paper considers an underlay pulsed radar-cellular spectrum sharing scenario, where the cellular system uses pilot-aided demodulation, statistical channel state information (S-CSI) estimation and limited feedback schemes. Under a realistic system model, upper and lower bounds are derived on the probability that at least a specified number of pilot signals are interfered by a radar pulse train in a finite CSI estimation window. Exact probabilities are also derived for important special cases which reveal operational regimes where the lower bound is achieved. Using these results, this paper (a) provides insights on pilot interference-minimizing schemes for accurate coherent symbol demodulation, and (b) demonstrates that pilot-aided methods fail to accurately estimate S-CSI of the pulsed radar interference channel for a wide range of radar repetition intervals.
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