In a wireless terrain, the presence of various obstacles leads to compliance of non-Line-of-sight (NLOS) norms between transmitter and receiver, which renders severe degradation in the service quality of the communication link and thereby limits the anticipated performance. The expected achievable rate is primarily affected by the location of the mobile receiver as well as the characteristics of the obstacles surrounding it for any wireless terrain. The achievable rate can be improved by deploying Intelligent Reflecting Surface (IRS) panels at properly identified locations. The presence of IRS panels stimulates a supplementary wireless channel that enhances reliable end-to-end connectivity between transmitter and receiver, especially when the direct path (Line-of-sight, LOS) is either experiences severe signal degradation or completely missing in shorter epochs. Using IRS, the performance of the wireless network can be improved by smartly re-configuring the passive reflecting elements which are embedded on a planar surface. In this paper, due to inherent geographical terrain specific attributes and the mobility aspects of a receiver, the end-to-end characterization of the wireless channel between a pair of transmitter and receiver is modeled using cascade arrangements of Time-Invariant (TI) and Time-Variant (TV) channel's impulse response. Further, the overall performance of wireless links is evaluated in terms of the key performance measures, namely, achievable rate and the span of network coverage. Obtained simulation results for two distinct geographical terrains validate the enhanced status of performance measures in IRS-assisted wireless terrains while regulating the system parameters, namely, IRS panel specifications, transmit power, and the velocity of the mobile receiver.

在无线地形中，各种障碍物的存在导致发射机和接收机之间符合非视距（NLOS）规范，这导致通信链路的服务质量严重下降，从而限制了预期的性能。对于任何无线地形，预期可达到的速率主要受移动接收器的位置以及其周围障碍物特性的影响。通过在正确识别的位置部署智能反射面 (IRS) 面板，可以提高可实现的速率。IRS 面板的存在刺激了补充无线信道，增强了发射器和接收器之间可靠的端到端连接，特别是当直接路径（视距、LOS）要么经历严重的信号衰减，要么在较短的时期内完全丢失。使用 IRS，可以通过巧妙地重新配置嵌入在平面上的无源反射元件来提高无线网络的性能。在本文中，由于固有的地理地形特定属性和接收器的移动性方面，一对发射器和接收器之间的无线信道的端到端特征是使用时不变 (TI) 和时变 (TV) 频道的脉冲响应。此外，无线链路的整体性能根据关键性能指标进行评估，即可实现速率和网络覆盖范围。