AI 中文总结
提出部分叠加导频辅助稀疏向量传输方案，通过稀疏导频降低干扰，联合信道估计与解码，提升高移动性URLLC的误块率性能。
AI 中文摘要
针对高移动性场景下的短包超可靠低延迟通信，提出了一种部分叠加导频辅助的稀疏向量传输（PSP-SVT）方案。与传统的全叠加导频辅助SVT方案不同，所提出的PSP-SVT方案仅在一部分子载波上部署少量导频。这种稀疏导频结构足以用于基于基扩展模型的信道跟踪，同时有效减少导频-数据干扰。基于PSP模式，开发了一种迭代接收机，用于联合执行信道估计和数据解码。PSP-SVT中减少的导频干扰提供了更准确的初始信道估计和数据检测，从而改善后续的迭代细化并减轻其错误传播。此外，研究了PSP数量和功率分配比对误块率（BLER）性能的影响，以揭示接近最优的导频配置。仿真结果表明，所提出的PSP-SVT方案在BLER方面优于现有的全叠加导频辅助SVT方案，且收敛速度快。
英文摘要
A partial superimposed pilot-aided sparse vector transmission (PSP-SVT) scheme is proposed for short-packet ultra-reliable and low-latency communications in high-mobility scenarios. Unlike conventional full superimposed pilot-aided SVT schemes, the proposed PSP-SVT scheme deploys only a few pilots over a subset of subcarriers. This sparse pilot structure is sufficient for basis expansion model based channel tracking while effectively reducing pilot-data interference. Based on the PSP pattern, an iterative receiver is developed to jointly perform channel estimation and data decoding. The reduced pilot interference in PSP-SVT provides more accurate initial channel estimation and data detection, thereby improving the subsequent iterative refinement and mitigating their error propagation. Moreover, the impacts of the number of PSPs and power allocation ratio on block error rate (BLER) performance are investigated to reveal the near-optimal pilot configuration. Simulation results show that the proposed PSP-SVT scheme outperforms existing full superimposed pilot-aided SVT schemes in terms of BLER with fast convergence speed.
