path loss造句
例句與造句
- Modeling of propagation path loss in a canopy
樹冠中電波傳播路徑損耗的研究及模型的建立 - Sky - wave path loss
天波路徑損耗 - Detailed depict of the influence to the system which cause by path , parameters to the multi - path are provided . discussed the path loss of the system and how to improve the system performance . 2
介紹多飛行器測控系統(tǒng)的信道特征，描述了信道對系統(tǒng)的各種影響和多徑信道的各種參數(shù)，并討論了小衛(wèi)星信道的干擾問題及其解決辦法。 - Then critical technologies of simulation system are discussed , including frame processing structure , fh sequence generator , simulation models of path loss and multipath channel , simulation of signal propagation delay and jamming signal etc
其次，討論了仿真系統(tǒng)實現(xiàn)的關(guān)鍵技術(shù)，包括幀處理結(jié)構(gòu)、跳頻序列發(fā)生器、路徑損耗與多徑信道仿真模型、信號傳播延時及干擾信號的仿真等。 - The objective of the test process was to examine how the signal - path loss varied after exposure to different levels of vibration , and if discontinuities could be forced through long - term fretting wear or by unbiasing the spring contact with excessive shock
測試的目標是檢驗在施加不同程度的振動之后，信號路徑損失是如何變化的，以及是否會通過長期接觸磨損或通過用過度沖擊使彈簧不偏置而形成不連續(xù)性。 - It's difficult to find path loss in a sentence. 用path loss造句挺難的
- Chapter 3 investigates the capacity improvement in cdma multi - cellular system with base - station smart antenna . we consider the effects of multipath interference , thermal noise , path loss , processing gain and voice activity factor . and introduces multiuser detection combined with smart antenna
考慮了多徑干擾、熱噪聲、路徑損耗、處理增益和語音激活因子的影響；并介紹了與智能天線技術(shù)相結(jié)合的多用戶檢測技術(shù)。 - Because it is a long time before the hybrid method getting the field , one can use the artificial net work ' s character of learning by itself , and get the law of the path loss . consequently , it become easier to study the wireless electrical wave ' s propagation characters
利用混合法計算場，比較耗時，可以運用人工神經(jīng)網(wǎng)絡(luò)的自學習功能，就能很快得出路徑損耗規(guī)律，從而更加方便對室內(nèi)的無線電波傳播特性進行研究。 - As the application of rake receivers with multitaps is widely used in cellularcdma systems for exploiting path diversity , the closed - loop power control schemesshould make use of the multitap rake receivers for tracking the power variation dueto path loss , slow fading , and fast fading
同時,本文給出的自適應變步長閉環(huán)功率控制算法利用rake接收機跟蹤信道的變化,與傳統(tǒng)的固定步長閉環(huán)功率控制相比獲得了較小的ebi0標準差。 - And using the channels functional model , we develop a computationally efficient method to predict the path loss and multipath power requirement of diffuse links based on the locations within a room . and getting two characteristic parameters : optical path and r . m . s delay spread
并利用該漫反射模型，我們設(shè)計出一個有效的計算方法來預測紅外室內(nèi)漫反射的路徑損失和多徑所需的最低功率，并成功獲得信道傳輸功率損失以及多徑時延擴展兩個參數(shù)。 - In order to utilize the frquency resource adequately and increase the capacity of mobile communication system , the wireless electric wave propagation of existing mobile system always adopts the microcell structure . forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network , at the same time it is a precondition for the research on the microcell mobile system . the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond , that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method , that is establish the deterministic model based on theoretical analyse . the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth , and introduce the common path loss transmition model in land mobile communication system , also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網(wǎng)絡(luò)規(guī)劃、設(shè)計提供了必要條件，同時也是研究微蜂窩移動通信系統(tǒng)性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據(jù)實驗、統(tǒng)計所得數(shù)據(jù)建立經(jīng)驗性傳播預測模型；另一種是用射線跟蹤方法，即依據(jù)理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統(tǒng)中常用的幾種電波傳播路徑損耗經(jīng)驗性預測模型，并指出了這些經(jīng)驗性傳播模型對于微蜂窩小區(qū)無線電波傳播特性研究的局限性。 - A simulation and modeling mechanism is studied and proposed for multirate transmission protocol . based on the wlan that adopts ofdm transmission technique , we first assumed that the small - scall fading and multipath in ofdm sub - channel is rayleigh , and large - scale path loss could be described by bi - linearity model , and then we analyzed the rationality
基于采用ofdm傳輸技術(shù)的wlan ，我們假設(shè)ofdm子信道的小尺度衰落服從rayleigh分布，路徑損耗可以用雙線性模型描述，并對假設(shè)的合理性進行了分析，將決定速率切換的誤幀率等物理層性能參數(shù)和媒質(zhì)控制協(xié)議有機地結(jié)合在一起，對多速率傳輸建模進行了有意的探索。 - The paper demonstrates the whole plan of the propagation model application software . with the delphi software , an application software including the function of the realtime calculating path loss value is compiled completely . the paper analyses the planning theory of the td - scdma network . its main aspects include the backbone of the network , the link budget report , the budget of the effective distance , the analyse of the link interference and the analyse of the system capacity
論證了td - scdma傳播模型應用軟件整體方案，利用delphi軟件編寫了具有校正功能和實時計算傳播衰耗值功能(與gps系統(tǒng)配合)的應用軟件。論文從理論的角度分析了td - scdma網(wǎng)絡(luò)的規(guī)劃理論，主要從網(wǎng)絡(luò)拓撲結(jié)構(gòu)、上下行鏈路功率平衡預算報告、有效通信距離的估算、上下形鏈路干擾的分析和系統(tǒng)最大容量分析五個方面進行了論述。 - The exact location of reflection and diffraction points is essential in order to calculate the polarization components of the reflected and diffracted fields and their trajectories . then , a vector addition of the received fields is carried out to obtain the total received field strength and , subsequently , the path loss along a predetermined route
該模型基于幾何光學理論、一致性幾何繞射理論和鏡像理論,通過大量的反射和繞射射線軌跡得出源點至場點的多條路徑,然后由矢量計算求出各場點處的路徑損耗。 - This text has counted the electric wave propagation path loss of street in one kind of typical rule range urban area , and reaches calculations data fairly with the measured data in the document . then calculate and analyze electric wave propagation ’ s characteristic in urban area . finally give an electric wave propagation prediction application example of column building model
本文最后計算了一種典型的規(guī)則排列得城市環(huán)境中街道得電波傳播路徑損耗,并與文獻中得實測及計算數(shù)據(jù)進行了比較,然后進一步對矩形、圓柱型建筑物城市小區(qū)電波傳播進行了分析計算。 - Accordingly ray tracing model for microcells propagation prediction has become an important subject . this paper discussed the characteristic of propagation in symmetrical atmosphere on the earth , and introduced several kinds of traditional path loss propagation model in land mobile communication system , also pointed out the localization of these models based on experiential methods
本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性,介紹了陸地移動通信系統(tǒng)中常用的幾種電波傳播路徑損耗經(jīng)驗性預測模型,并指出了這些經(jīng)驗性傳播模型對于微蜂窩小區(qū)無線電波傳播特性研究的局限性。