论文标题
半盲置后平衡器SINR估计和雷达 - 细胞共存的双CSI反馈
Semi-Blind Post-Equalizer SINR Estimation and Dual CSI Feedback for Radar-Cellular Coexistence
论文作者
论文摘要
当前的蜂窝系统使用试验性统计通道状态信息（S-CSI）估计和有限的反馈方案来帮助链接适应和调度决策。但是，在存在脉冲雷达信号的情况下，试点辅助的S-CSI不准确，因为对飞行员和非行李箱资源的干扰统计数据可能有所不同。此外，由于周期性干扰，该通道将是双峰的。在本文中，我们提出了一种最大敏捷启发式，以估算非脉冲脉冲雷达干扰的情况下平价SINR，并将其分布表征为噪声方差和干扰能力的函数。我们观察到，所提出的启发式会产生较低的计算复杂性，并且在不同调制方案（尤其是QPSK）的某个SINR阈值之外是可靠的。这使我们能够开发一个综合的半盲框架，以估计3GPP长期进化（LTE）和新无线电（NR）网络中通常用于S-CSI量化的宽带SINR度量。最后，我们提出了双重CSI反馈，以实施雷达细胞频谱共享，以在双峰通道中准确地采集CSI。与传统的试点辅助AD估计和有限的反馈方案相比，我们证明了吞吐量，块错误率和重新启动LTE诱导的潜伏期潜伏期的显着改善。
Current cellular systems use pilot-aided statistical-channel state information (S-CSI) estimation and limited feedback schemes to aid in link adaptation and scheduling decisions. However, in the presence of pulsed radar signals, pilot-aided S-CSI is inaccurate since interference statistics on pilot and non-pilot resources can be different. Moreover, the channel will be bimodal as a result of the periodic interference. In this paper, we propose a max-min heuristic to estimate the post-equalizer SINR in the case of non-pilot pulsed radar interference, and characterize its distribution as a function of noise variance and interference power. We observe that the proposed heuristic incurs low computational complexity, and is robust beyond a certain SINR threshold for different modulation schemes, especially for QPSK. This enables us to develop a comprehensive semi-blind framework to estimate the wideband SINR metric that is commonly used for S-CSI quantization in 3GPP Long-Term Evolution (LTE) and New Radio (NR) networks. Finally, we propose dual CSI feedback for practical radar-cellular spectrum sharing, to enable accurate CSI acquisition in the bimodal channel. We demonstrate significant improvements in throughput, block error rate and retransmission-induced latency for LTE-Advanced Pro when compared to conventional pilot-aided S-CSI estimation and limited feedback schemes.
