multipath signals 中文意思是什麼
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A doa estimation algorithm for multipath signals based on burg iterations
基於貝葉斯網路的并行分佈估計演算法研究 -
In order to utilize the resoluble ability of signals and improve resistant ability to multipath fading, the rake receiver is a good option. but proper rake operation requires information about the delays and attenuations of the channel paths which is difficult to obtain
本文以uwb通信系統為背景，主要研究uwb系統室內密集多徑通道的通道估計方法，以及基於turbo原則的迭代通道估計的接收機結構。 -
The multipath interference, resulted from interfering between the signals of the line of sight ( los ) and the line of ground reflection in vhf - rc, makes bit error rate of data transmission increased and system reliability attenuated
當前，中國水波中繼通道以直視路徑傳播為主，同時存在地面折射路徑對直射信號產生干涉，造成多徑干擾。這種干擾使得信號傳輸的誤碼率上升，系統可靠性下降。 -
The improved algorithm not only inherits the fast convergence trait from rls and realizable systolic array from qr _ rls, but also eliminates square - root operation and gets directly equalizer output signals from systolic array. so this algorithm has more simple operation, faster executing speed, less hardware resource and lower hardware cost. some different equalization algorithm are imitated on the qpsk communication system with multipath channel
其次對一些成熟的自適應均衡演算法（如lms演算法、 rls演算法、 qr _ rls演算法、逆qr _ rls演算法）進行了分析;介紹了一種改進后的無平方根的qr _ rls演算法，該演算法不但繼承了rls的快速收斂特性和qr _ rls演算法的systolic陣列可實現性，還取消了qr _ rls演算法的平方根運算，使演算法在硬體實現時運行速度更快，佔用資源也更少，同時該演算法還可由systolic陣列直接得到均衡后的輸出信號，運算量更小。 -
Furthermore, the most advanced adaptive arrays can take advantage of the multipath phenomenon to focus radio signals still further
不僅如此，最先進的適應型陣列還可以利用這種多路徑現象，進一步集中無線電訊號。 -
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。 -
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 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。 -
From the disser tation, it is noted that smart antenna can effectively deal with mobile communication signals such as coherent signals, non - gaussian signals and multipath signals, etc
通過本文的研究，實現了智能天線對接近現實的相干信號源、非高斯信號源、經多徑通道傳輸后等情況下信號的有效處理。 -
The purpose of this thesis is not only to overcome multipath interference by spread spectrum but also to improve the performance of the system by employing rake receiver to recombine some multipath signals
擴頻技術在水聲通道中的應用遠沒有在空間中成熟，這方面的研究也比較少，因此，這是一個充滿了挑戰的研究領域。 -
Ber performance of rake receivers for uwb signals in multipath channels
接收機的超寬帶信號多徑性能分析 -
The specific route is as follows : firstly, the output signals from the multipath sensor are nornalized, i. e., all sensor signals ( including the analog data ) are transformed into multipath square wave pulse signals to form multipath parallel condition codes. these codes are treated as input signals for dac to obtain a series of dispersed analog signals for output as input signals for the vco. finally, a high frequency modulation signal is conducted at the vco ' s output
具體技術路線如下：先將由多路傳感器輸出的信號進行歸一化處理，即將所有傳感器信號（包括模擬量）轉換成多路方波脈沖信號，以形成多位并行信號的狀態碼，將其作為dac的數據輸入信號，從而得到一系列離散的模擬信號輸出，作為vco的輸入信號，最終在vco輸出端形成高頻的調制信號。 -
Making blind algorithm of multipath fading underwater acoustic channels suitable for high order qam signals
信號的水聲通道盲均衡演算法 -
With the high - speed developing of radio technology, the tradition system ca n ' t deal with the problem of coherent signals and multipath interference
隨著無線電技術的高速發展，對同頻信號、多徑干擾等問題，傳統的測向系統顯得無能為力。 -
In the field of underwater acoustic communications, the intersymbol interference caused by multipath effects will make the reliability and the rate of the propagation of underwater acoustic signals
在水聲數字通信系統中，聲波傳播的多途效應會引起嚴重的碼間干擾，使水下數據傳輸的可靠性和數據傳輸速率都大大的降低。 -
With the development of information technology and internet, net communication, satellite communication, all kinds of conference call and in some special conditions, like underwater acoustic communication demand it more reliable and can keep secret and be low probability of interception. because of the effect of multipath and doppler shift, the signals through the channel fade rapidly
隨著人類向信息技術和信息網路時代的邁進，網路通信、衛星通信、各種電話會議以及某些特殊的通信場合（如水聲通信）中都對通信的保密技術、低截獲率和可靠性提出了更迫切的需要和更高的要求。 -
Ofdm signals have efficient spectral bandwidth, and the performance of the ofdm system against multipath fading is better than that of the single carrier modulation system
此項技術具有較高的頻帶利用率，並且與單載波調制技術相比可以更為有效的對抗無線通道中的多徑干擾。 -
The narrow pulses of uwb make it possible for some receivers to resolve the separate multipath streams and use multiple “ arms ” to lock onto the various reflected signals
由於超寬頻具有短脈沖，某些接收機就可能解析出不同的多路徑訊號流，並利用多個武器鎖定不同的反射訊號。
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