Wireless Channel Estimation in Shipbuilding Scenario Based on Reconfigurable Intelligent Surface

Xinhai Yan, Dongyao Wang, Ziping Wei, Bin Li
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Abstract

Channel State Information (CSI) estimation is a very important part in the wireless communication system within the complex shipbuilding scenario. The estimation accuracy determines the rationality of the design of the precoding module in the whole communication system, and influence the spectrum efficiency and channel capacity. This paper firstly summarizes the traditional channel estimation technologies and analyzes their strengths and weaknesses. Then, with the low-rank property of channel matrix under the complicated electromagnetic environment within the shipbuilding scenario, this work proposes a fast estimation scheme for high-precision channel state information, which balances two very important but contradictory optimization objectives for channel estimation, i.e. computation complexity and accuracy. While greatly reducing the time complexity of channel estimation, the proposed method also greatly improves the estimation accuracy, which is verified by the simulation results.
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基于可重构智能表面的船舶场景无线信道估计
信道状态信息估计是复杂船舶环境下无线通信系统的重要组成部分。预编码模块的估计精度决定了整个通信系统中预编码模块设计的合理性,影响着频谱效率和信道容量。本文首先总结了传统的信道估计技术,分析了它们的优缺点。然后,利用舰船复杂电磁环境下信道矩阵的低秩特性,提出了一种高精度信道状态信息的快速估计方案,平衡了信道估计中计算复杂度和精度两个非常重要但又相互矛盾的优化目标。该方法在大大降低信道估计时间复杂度的同时,也大大提高了信道估计精度,仿真结果验证了这一点。
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