multipath propagation 中文意思是什麼
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Depending on the characteristic of the mobile station system can reduce more influence such as multipath interference and none - line - of - sign ( nlos ) propagation than fixed station
同時利用該系統自身特點，避免了許多在固定站系統中多徑干擾、非視距傳播等定位難題。 -
In order to achieve high data rates on the severely band - limited underwater acoustic ( uwa ) channels, bandwidth - efficient modulation techniques must be employed, together with some sophisticated signal processing algorithms, such as adaptive equalization technique for the intersymbol interference caused by channel multipath propagation
在帶寬嚴重受限的水聲通道中實現高數據率通信，必須使用高帶寬利用率調制技術，並結合自適應均衡等技術以有效地克服通道多途傳播產生的符號間干擾。 -
Based on the facts that time of arrival ( toa ) of the first multipath signal is always most close to that of los propagation and angle of arrival ( aoa ) of the first multipath signal is not always most close to that of los propagation among all multipath signals in nlos propagation environment, a location algorithm is proposed to mitigate the influence of nlos propagation, which effectively reduces the feasible region of a ms in macrocells
依據在非視距傳播環境下存在的以下兩個事實：第一，最先到達多徑信號的波達時間總是最接近直達波的波達時間。第二，最先到達多徑信號的波達方向並不一定最接近直達波方向。針對宏蜂窩系統，從有效減小移動臺可行域的角度，提出了一種減輕非視距影響的定位演算法。 -
The land clutter is useless signals for target detection caused by land terrain. the multipath effect is some kind of interference which is caused by wave reflection on terrain. the diffraction effect is the phenomenon of wave propagation into shadow region
地雜波是由地面散射引起的對目標探測無用的信號;多路徑是由電磁波在地面反射所引起的干涉;衍射則是電波繞射傳播到遮蔽區的現象。 -
This dissertation has studied the effects caused by terrain environment on the propagation of rf signal. the effects includes land clutter, multipath and diffraction
論文主要研究地面環境對射頻信號傳播的影響，包括三個方面的內容:地雜波效應、多路徑效應和衍射效應。 -
Underwater acoustic communications ( uwa ) are made difficult by the combined effect of multipath propagation and high temporal and spatial variability of the channel conditions. the fading which was caused by multipath propagation was one of the main factors influencing the performance of underwater acoustic communication systems
水聲通道中廣泛存在的多徑傳播效應是水聲通信所面臨的主要障礙之一，由多徑所產生的信號衰落效應是影響水聲通信系統性能的主要因素之一。 -
With the characteristics of large ambient noise, very narrow bandwidth, low carrier frequency, great propagation latency and time - space - frequency variant multipath effect ( mpe ), the stochastic ocean channel has demonstrated the greatest complexity and difficulty for underwater acoustic wireless communications. among them multipath effect ( mpe ) is the most difficult obstacle that results in signal fading and inter - symbol interference ( isi )
但是噪聲高、帶寬窄、載波頻率低、傳輸時延大、多途徑效應隨時間?空間?頻率變化等通道特性都會給有效、可靠的水聲通信帶來很大的麻煩，其中多途徑效應是最主要的困擾因素，它會導致信號幅度衰落和碼間干擾。 -
Through the analysis of the test data and the new development in the relevant literature, some more realistic models for sea - clutter and multipath propagation is concluded and the simulation is accomplished in the software. they provide the foundation for low - altitude radar target detection & tracking techniques research. in the second part, radar low - altitude target detection & parameters ( elevation - azimuth - range delay - doppler shift ) measure are studied
（海）雜波和目標信號的多徑傳播嚴重影響了雷達低空目標探測與跟蹤的性能，通過分析國內外的有關試驗數據和最新的研究進展，總結出比較接近實際的海雜波和多徑傳播模型，並在有關軟體中實現了海雜波與多徑傳播的模擬，為進一步研究各種低空目標探測與跟蹤測量演算法提供了保證。 -
Rtce is based on forecasting the inherent vulnerabilities to propagation of hf time - varying channel, including multipath delay, doppler spread, selective fading, interference, so this paper also introduces characteristics of hf channel in the beginning. familiar rtce systems all adopt envelope method that bello brought forward
實時選頻技術是基於對短波電離層時變通道固有的不利於電波傳播的各種因素，包括通道的多徑展寬、多普勒展寬、選擇性衰落、噪聲干擾等的預測的基礎上實現的，所以在開篇對短波通道的特點進行了詳細的介紹。 -
The third part pay more attention to elevation tracking with monopulse radar while the target is in the horizon region. multipath propagation seriously degrades the performance of elevation tracking and makes the radar unable to work properly
當目標處在這一區域時，信號的多徑傳播給俯仰角測量帶來很大誤差，使包括dmc雷達在內的許多雷達難以正常工作。 -
In wireless communication system, signal fading arising from multipath propagation is a particularly severe channel impairment that can be mitigated through the use of diversity
在移動通信系統中，由於多徑傳播引起的衰落對通道產生的嚴重影響可以通過分集技術得到有效的解決。 -
Sponsored by dmc - radar applied in a navy range, this dissertation focus on the low - altitude / low - angle radar target detection & tracking techniques. it contains four parts : in the first part, the models of sea - clutter and multipath propagation are studied, which affect the radar ' s detectability and tracking ability of low - altitude target seriously
結合海軍某靶場dmc相控陣雷達的研製，著重研究了海面上低空目標雷達探測和跟蹤測量的有關技術，論文分為四個部分：第一部分系統分析了海雜波與多徑傳播的建模與模擬問題。 -
Furthermore, combined with fec and interleaving, ofdm shows a high priority in countering the frequency - selective fades and isi caused by multipath propagation
Ofdm的實現主要採用了fft技術，利用現有的數字信號處理器（ dsp ）已經可以實時實現。 -
The effect of multipath propagation commonly exists in the underwater acoustic channel and the fading which was caused by multipath propagation was the main influence factor of underwater acoustic communication system
水聲通道中廣泛存在著多徑傳播效應。由多徑傳播引起的信號衰落現象是影響水聲通信系統性能的主要因素。 -
It includes : target detection under sea - clutter and multipath propagation, multipath effects on parameters measure of target, analysis and comparsion of all multipath reduction techniques " performance
它包括海雜波背景和多徑傳播影響下的目標檢測技術研究；多徑傳播對目標參數測量的影響；各種多徑消除技術的性能分析與比較。 -
In the end, this paper considered detecting the desired user signal for uplink ds / cdma system. in that case, we need to suppress both mai and inter - chip interference ( ici ) caused by multipath propagation
最後，本文研究了在ds cdma的上行通道中，同時存在多用戶干擾和多徑傳播引起的碼間干擾的情況下，對期望用戶信號的檢測。 -
Frequency - selective fading due to multipath propagation is a big obstacle in wireless communication. in the condition, the intersymbol interference ( isi ) comes into being and communication system appears error received symbol
多徑傳輸效應引起的頻率選擇性衰落是無線通信的一大障礙，使接收信號產生碼間干擾（ isi ） ，導致通信系統出現誤碼。 -
The characteristics of the underwater acoustic channel are analyzed in this thesis, with the emphasis on the multipath propagation characteristics. and the underwater acoustic multipath channel model is established on the basis of ray theory
在本論文中，我們對水聲通道特性，尤其是水聲通道的多徑傳播特性進行了分析，並且在聲線理論的基礎上建立了水聲多徑通道模型。 -
When the high rate data is transmitted through bandlimited channels in mobile communications, the intersymbol interference ( isi ) caused by channel distortion and multipath propagation will bring decoding error. it needs to adopt appropriate techniques to remove or reduce this kind of interference
當在帶限通道上傳輸高速數據時，會因為通道畸變和多徑效應產生的碼間干擾而產生誤碼，這就需要採用適當的技術來消除或減少這種干擾。 -
2. in the simulation environment which is deliberately designed for the othr ' s multipath propagation phenomenon, strict and detailed reasoning and demonstrations of the coordinate registration are given. and then a simulation justifies the correctness of the registration
針對超視距雷達多徑傳播現象設計的一種模擬環境，對其中量測模型的坐標變換給出了嚴格而詳細的證明，然後根據證明的公式設計了具體的模擬示例，並對該坐標變換公式組進行了誤差統計。
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