multipath signal 中文意思是什麼
multipath signal
解釋
多程信號-
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。 -
In the thesis, i introduce the theory and application of gps carrier phase measurement, analyze the errors in the observation of gps signal, study the ways to reduce these errors, specially for the error caused by multipath
論文介紹了gps載波相位測量技術的原理和應用，分析了gps觀測量的誤差，研究了減小和消除各種誤差的方法，重點是減小多徑效應的影響。 -
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。 -
The optical channel models for airborne submarine laser communication are built. the multipath time spreading of signal pulse is studied. the waveform of received signals in receiver in submarine laser communication system is analyzed and simulated
通過蒙特卡羅方法的模擬研究，建立了機載激光對潛通信的光脈沖傳輸模型，研究了信號光脈沖的時間擴展，分析並模擬了接收面上的接收波形。 -
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。 -
In wcdma system which uses direct sequence to spread spectrum, the spread spectrum code ( pn code ) phase of the receiver must be synchronized with that of the received signal precisely to despread and demodulate the signal correctly. multipath channel exists in the mobile communication environment for the radio signal reflection by obstacles between transmitters and receivers. by using the autocorrelation of the spread sprectrum code, rake receiver can process received signals and therefore multipath components can be resolvable
在wcdma系統中，為正確解擴解調接收到的擴頻信號，接收機本地產生的擴頻碼（ pn碼）相位必須和接收信號中的擴頻碼相位完全同步;同時移動通信環境中的傳輸信號由於接收機和發射機之間的直達路徑有可能被建築物或其他障礙物所阻礙，總是經過折射或反射的多條路徑后才到達接收機，從而產生多徑通道。 -
Combined with the data - selected schemes proposed, the computational complexity of this method can be lowered. the performance of the presented rls method is analyzed by simulations, and it is shown that this method is interesting for application. 4 time - selective channel signal model based on multipath - doppler diversity representation is given in multi - path fast fading channel, and rls space - time receiver algorithm based on time - varied constraint condition is presented and the computational complexity of this method is analyzed
4 、針對多徑快衰落通道下的ds - cdma系統，給出了基於多徑-多譜勒觀點描述的1百安電弓卜科東兔j憶學協士學位論文時間選擇性通道的信號模型，提出了基於變約束條件下的遞歸最小二乘空時接收機演算法並分析演算法的運算量，最後通過模擬分析了所提出的方法的性能。 -
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。 -
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。 -
Multipath fading signal analysis with wavelet and fractal theories
基於小波和分形理論的多徑衰落信號分析 -
By including the multipath reflections in the mathematical equations, the processor can extrapolate not only the direction of the signal but also the exact position of the user ' s cell phone
把多路徑的反射加入數學程式之後，處理器不僅可以外推出訊號的方向，還可以算出用戶行動電話的確切位置。 -
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。 -
The underwater acoustic channel is very complex where cochannel interference, doppler frequency offsets, narrow bandwidth and time and frequency selective deep fades obstructs the development of high speed and fidelity underwater data transmissions. thus projects of high speed and fidelity underwater signal transmissions become a hotspot in the fields of world academic circles. the conventional serial communication must use adaptive equalizer to combat the multipath in real - time
海洋水聲通道是一種極其復雜多變的時-空-頻變參通道，其通道窄，強多途干擾，信號起伏衰落嚴重，一直是水下信息可靠高速傳輸的主要障礙，因此如何在水聲通道中高速率準確地傳輸數據，就成為世界性的熱門課題。 -
First, we classify the multipath mitigation techniques into four categories, and then the presentation of principles and simulation of performances are done of three widely - used techniques of multipath mitigation, which are based on the code tracking loop with the name of narrow - correlator - spacing technique 、 els ( early late slope ) technique and medll technique. from the presentation and simulation, the medll technique is selected as the multipath mitigation algorithm in signal processing ’ s scope.
本章首先對多徑消除技術進行了分類，然後主要對基於碼跟蹤環路的三種技術-窄相關（ narrowcorrelatorspacing ）技術、 els （ earlylateslope ）技術和medll （ multipathestimatingdelaylockloop ）技術-進行原理分析和性能模擬，從中選擇medll技術作為接收機信號處理階段的多徑消除演算法。 -
Designing a multipath synchronous data acquisition board based on digital signal processing
多路同步數據採集板設計 -
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。 -
Second some scatter location algorithms are analyzed. because one kind of the scatter location algorithm depends on the scatter model, two scatter location algorithms are analyzed which can make precise location to the scatters and mobile station, non - linear least square scatter location algorithm and closed - form scatter location algorithm. the simulation results show that the non - linear least square scatter location algorithm has two limitations : ( 1 ) at least six multipath signal are needed
然後分析討論了現有的多種基於散射體信息的無線定位演算法，由於基於散射體通道模型的定位演算法太依賴于模型的準確性，因此本文主要分析了對散射體精確定位的演算法中的兩種:非線性最小二乘散射體演算法和閉式散射體演算法，並對這兩種演算法進行了模擬分析。 -
Second, the transmission and reception models of basedband cdma system based on complete complementary codes in up - and downlink are discussed and its performance in awgn channel is analyzed and evaluated through simulation. third, a receiver for multipath signal reception is investigated, which consists of two matched filters : one for channel impulse response estimation and the other for data detection
接下來，對基於完全互補碼的基帶cdma系統上行鏈路和下行鏈路發送與接收模型進行了討論，分析了該系統下行鏈路在awgn通道中的系統性能，並對該系統上行鏈路和下行鏈路在awgn通道中進行了模擬。 -
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。 -
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。
分享友人