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- multipath propagation model 多径模型
- In indoor environments, ultra-wide band signals suffer from dense multipath propagation and severe time dispersion. 超宽带信号在室内环境中将经历密集多径传播,产生严重的时间弥敞。
- Orthogonal Frequency Division Multiplexing (OFDM) has high spectrum efficiency and capability to mitigate the side-effect of multipath propagation. 正交频分复用(OFDM)技术由于具有较高的频谱效率,而且可以有效地对抗多径传输,已成为高速数据传输的关键技术。
- The limited channel bandwidth and ISI introduced by channel multipath propagation are the obstacles for underwater acoustic (UWA) communications. 受限的信道带宽和由于信号多途传输造成的码间干扰一直是水声通信的主要障碍。
- Code Red Worm Propagation Modeling and Analysis. 本文建模和分析了红色代码蠕虫的传播。
- But the noises, the attenuation and the multipath propagation inhering in the powerline make it very difficult to realize such kind of communication system. 但是电力线信道上存在的各种噪声、衰减和多径传播等问题,这些都大大提高了通信的难度。
- By making use of two-dimensional (2D) ray tracing model results, a new propagation model was presented. 摘要射线跟踪是一种有效的无线通信电波传播预测方法。
- In the paper, the NLOS light propagation model based on Monte Carlo method is described in detail. 研究表明，该模型与单次散射近似应用在近距离、天气条件好时NLOS传输的模拟结果比较吻合。
- The EFM was employed to establish the crack propagation model of rock under the action of transient temperature field. 摘要应用无单元法建立了瞬态温度场作用的岩体裂缝扩展模型。
- The photon propagation model and photon propagation rule are two key components of bioluminescent imaging. 研究生物组织中的光子传输模型和光子传输规律;是开展在体生物光学成像研究的两个关键环节.
- Propagation model of power density in EM radiation in cities has been derived fromthe study of EM radiation test in the cities of Xiamen and Zhangzhou. 通过厦门和漳州两城市电磁辐射测试研究，给出城市电磁辐射功率密度传播模型。
- Under the spherical coordinate, the tsunami propagation model is built to simulate the transoceanic-tsunami travel time by finite difference method. 本文基于强震台网提供的地震要素，从理论上讨论海啸预警时间计算方法。
- Based on the assumption of single-scattering,atmospheric propagation model of non-line-of-sight optical scattering communication system is studied. 利用大气对光的散射作用可以实现非视线通信.;在单次散射假定下;研究了非视线光散射通信系统的大气传输模型
- A low-complexity joint angle and delay estimation algorithm is presented for asynchronous DS-CDMA systems under multipath propagations. 针对异步DS-CDMA系统中的多用户环境,本文提出了一种低复杂度的联合角度一时延估计算法。
- Based on the Okumura-Hata Propagation Model, we analyze theoretically the effect of MAI on the WCDMA property, and educe the relation between MAI and coverage and capacity. 在Okumura Hata传播模型基础上;分析了多址干扰对宽带码分多址系统性能的影响;得出了多址干扰和宽带码分多址系统的覆盖范围、容量之间的关系式.
- Using the Normal Model Theory and Wavenumber Integration Method, a low frequency acoustic wave propagation model in shallow sea of multi-layered media is constituted. 应用简正波理论并结合波数积分法,建立了浅海低频声传播特性的仿真数学模型。
- Blinding Signal Separation (BSS) method, however, can greatly reduce the errors to the separation results, caused by the signal propagation model and receiving arrays. 采用盲信号分离方法,本质上可以大大减少传输模型误差和阵列误差对分离结果的影响,有利于提高精度。
- Consulted by the radio network optimization, the precise DTM data and propagation model are applied to predict the coverage of sites with given geographic coordinates and system configurations. 信号在实际传播过程中因受地形、地物的影响而衰落 ,无线网络设计工程需要应用精确的数字地面模型数据和准确的信号传播模型 ,对指定站址和小区参数的基站进行覆盖质量预测 ,为网络优化提供依据。
- Based on the Radio Propagation Model and Finite State Machine, this article proposes the route to establish the simulation model of physical layer protocol of WLAN,and the approach to implement the IEEE 802.11b protocol in a specific network simulator. 基于无线信号传播模型和有限状态自动机理论;提出了无线局域网物理层协议仿真模型的设计思路和在具体的网络仿真器中实现IEEE 802.;11b协议的方法。
- Error propagation model is used to evaluate the GPP estimation of grassland transect in Tibetan Plateau， based on the uncertainties of input variables and the result of sensitivity analysis. 在确定模型输入变量可能误差的基础上，结合模型敏感性分析结果，利用误差传播模型，计算和量化青藏高原草地样带总初级生产力（GPP）估算的不确定性。
