multipath delay 中文意思是什麼
multipath delay
解釋
多徑時延-
7. in chapter 8, a new method for estimating the doppler and multipath time delay of the overlapping echoes for lfm pulse radar by only one period pulse signal is presented
7 .在第八章提出了一種對lfm脈沖雷達回波d叩pler頻移和多徑時延進行聯合估計的方法。 -
Multipath time delay estimation based on adaptive parameters approach using fourth - order cumulants
基於四階累積量的自適應參數型多徑時延估計 -
And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion
論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。 -
Then multipath doa ' s and amplitudes can be estimated by using multipath delays. besides, wmsa and delay tracing techniques are used to improve the precision of parameter estimation and the performance of the whole system is improved in some degree accordingly
此外，我們還使用了wmsa （ weightedmulti - slotaveraging ） 、時延跟蹤等技術來提高多徑參數的估計精度，從而使整個系統的性能得到一定程度的改善。 -
A new constrained deconvolution method and its application in multipath time - delay estimation
一種新的多徑時延估計的約束反卷積方法 -
In mis paper the muitipath radio channel ' s characters were discussed in detail, they include the multipath number distribution, the muftipafh time delay distribution and the muitipath small scale fading distribution. their distribution taws were theoretically derived by new ideas and were simulated in computer, the results were wem proved according with the actual tests published in ieee papers
新的參數分佈模型能夠用實際測試結果進行修正，模擬出的結果與權威文獻發表的實測數據吻合較好，而以往的經驗分佈只是本文推導出的參數分佈在一定情況下的特例。 -
Firstly, the effects of short - delay multipath to the dll, pll, and snr of receive signal are discussed. then the effects of multipath to multiple closely spaced antennas are presented. and solve the problem by promote a new method based on extended kalman filtering, which utilize the correlation of measure data of dll, pll and snr of each antenna
最後，利用小范圍多天線系統中多徑信號對接收機碼環、載波環及信噪比影響的相關性，提出了基於擴展卡爾曼濾波器的多徑干擾抑制技術，解決了近距多徑信號的抑制問題。 -
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
並利用該漫反射模型，我們設計出一個有效的計算方法來預測紅外室內漫反射的路徑損失和多徑所需的最低功率，並成功獲得通道傳輸功率損失以及多徑時延擴展兩個參數。 -
This article sets forth the orientation theory of digital television and radio signals ' space position, speed, clock error and etc. and then analyses the error, troposphere delay, multipath and shelter domine effect, relying on the creation of hypodistance arithmatic model and the deduction of calculation formulae
摘要文章通過建立偽距數學模型，推導整理出計算公式，從而對數字電視廣播信號的空間位置、速度和時鐘偏差等參數的定位原理進行了闡述，最後對誤差、對流層延遲、多徑和遮擋效應等進行了分析。 -
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。 -
Multipath acquisition decide the coarse pn code phase and pick up the available multipath components. following, code tracking confirm the pn code phase precisely and track every multipath component ' s delay drifting due to doppler effect. in this paper, the code tracking technique in spread spectrum communication is introduced
本論文首先介紹了在擴頻通信中採用的同步跟蹤技術，結合wcdma上行鏈路的特點，提出了適合wcdma上行鏈路的pn碼跟蹤方案，並與現有的多徑搜索和通道估計演算法構成完整的上行鏈路rake接收機方案。 -
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，討論了模擬系統實現的關鍵技術，包括幀處理結構、跳頻序列發生器、路徑損耗與多徑通道模擬模型、信號傳播延時及干擾信號的模擬等。 -
However, multipath components can be resolvable due to the autocorrelation of the spread spectrum signal, thus the optimal receiver equals coherent rake reception, i. e. maximum ratio combining the independent components which endure flat fading or frequency non - selective fading. synchronization of pn code and separation of resolvable multipath components need to estimate the exact time delay among the multipath components
但是利用擴頻信號的自相關特性，可分辨多徑可以被有效分離，最優接收機等效為對多個具有獨立平坦衰落通道（或頻率非選擇性通道）特性的多徑信號進行最大比合併，即相干rake接收。 -
The technology of very low bit rate for hf ( high frequency ) communication means that, one technology of ecm ( electronic counter measures ) resistant communication is developed for low bit data message exchange in the time of battle which data communication is destroyed by electronic disturber. it is regarded by armies in the battle of information, because that it can overcome the very low snr ( signal noise ratio ), very high narrow - band interference and multipath with maxium delay of fifty millisecond
短波最低限度通信技術是在戰時強電磁干擾情況下能實現保證最低限度的數據報通信的一種抗干擾通信技術。由於其能有效的克服極低信噪比、較強的窄帶干擾和幾十毫秒的多徑，在信息戰中受到各軍高度重視。 -
By way of analysis about the typical gps receiver tracking loops, the mathematical models of code multipath error and carrier phase multipath error are proposed in the dissertation ; by way of analysis about geometrical model of multipah signal, the mathematical model of differential path delay is proposed in the dissertation ; based on the above analysis, a improved carrier phase multipath mitigation algorithm using closely - spaced multiple antennas array is proposed, the result of computer simulation proves that the algorithm is feasible. the attitude parameters are often estimated using direct computation method. the relationship between the accuracy of attitude parameters and baseline length as well
本文從經典的gps接收機跟蹤環出發，分析了多徑效應對偽距觀測量、載波相位觀測量和snr的影響，提出了碼相位多徑誤差和載波相位多徑誤差的數學模型；通過對多徑效應的幾何模型分析，提出了多徑信號相對路徑延遲的數學模型；在此基礎之上，提出了一種改進的基於窄間距多天線陣列的載波相位多徑誤差抑制演算法，通過計算機模擬證明了該演算法的有效性。 -
For the multipath delay spreading problem existing in the mobile communication systems, a parallel quadrature am data transmission system with a number of overlapping subchannels is investigated
摘要針對移動通信系統中存在的多徑延時擴展問題，研究了一種具有很多相互重疊子通道的并行正交調幅數據傳輸系統。
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