coherent signals 中文意思是什麼
coherent signals
解釋
同調拉曼效應-
The signal we named it fundamental wave ; according to the fundamental wave, coefficients of the fundamental wave can be lined in a sequence. when the unique of the dissolve of the fundamental wave can be confirmed, the sequence of the coefficients can be regarded as one of representation forms of the signal itself ; theory of dissolvable signal shows that when order of the matrix of fundamental wave sampling equals to number of fundamental waves, the sequence of the sampling values from sampling points must be matched one by one with the sequence of the coefficients of fundamental waves. the sampling composed by sequences of the sampling values must be full sampling ; the relevant deductions of the theory of dissolvable signal shows that when sampling the signal, sampling frequency must be lager than the ratio of the number of fundamental waves to the occupation time of the fundamental waves ; to band - limited signals, when the fundamental wave is a sine signal, the results from the relevant deductions of theory of dissolvable signal is coherent to the classic sampling theory
本文通過分析認為，當信號集中的任一信號可表示為一系列已知信號的線性代數和時，信號集便構成可分解信號集，已知信號稱為基波信號；對可分解信號而言，基波系數構成一序列，當對指定的基波信號集分解唯一確定時，系數序列本身便是信號的一個表示；可分解信號采樣定理指出當基波樣值矩陣的秩等於基波數時，則由采樣點處的采樣樣構成的樣值序列必與基波系數序列一一對應，從而由該樣值序列構成的采樣必為完全采樣；可分解信號采樣定理中的推論指出，對信號集進行采樣，采樣頻率必須大於其信號分解的基波數與其對應時長之比；對有限帶寬信號，若基波信號為正弦信號時，由可分解信號采樣定理推論給出的結論與經典采樣定理一致。 -
Synthetic aperture radar ( sar ) is a kind of coherent pulse radar which appeared in 1950. it can improve space resolution by fully using the signals " coherence
合成孔徑雷達（ sar ： syntheticapertureradar ）是20世紀50年代發展起來的一種相干雷達。 -
First, we study the algorithms of the classical music and root - music. compared with the classical music, root - music had less calculation consumption. and when the signals are coherent or correlated we have presented a modified music algorithm
在music類演算法中，比較了求根music和經典music演算法，其中求根music演算法相對于經典music演算法大大減少了計算量並提高了估計精度。 -
Optimum beamforming for coherent signals
存在相干信號時的最優波束形成 -
Beamforming of coherent signals based on uniform circular array
基於均勻圓陣的相干信號波束形成方法 -
A robust optimum beamforming algorithm for coherent signals
一種存在相干信號時的穩健的最優波束形成演算法 -
New beamforming for coherent signals in the presence of uncorrelated interferences
一種能有效接收相干信號的波束形成技術 -
However, as to correlated especially coherent signals and adjacent signals with small signal to noise ratio ( snr ), music algorithm cannot estimate their doa
然而，對于相關信號（特別是相干信號）以及相隔比較近的小信噪比信號， music演算法卻分辨不了它們的doa 。 -
In this paper, we have presented a modified music algorithm, which can estimate the doa of coherent signals and adjacent signals with small snr effectively
本文提出的是一種修正過的music演算法，該演算法能有效的估計出相干信號以及相隔比較近的小信噪比信號的doa 。 -
Once stored, the signals can be transcribed back into an exact replication of the original signal whenever desired. ultra high speed data acquisition is the main technique in drfm. the most common use of the drfm is for replication of complex, coherent signals usually representing radar return signals
數字射頻存儲器是現代電子對抗系統中有源雷達干擾機的主要組成部分，用於將接收到的雷達信號的精確的復制信號返回該雷達系統，以此來混淆該系統。 -
Time domain synchronous averaging can reduce the signal not coherent to rotation frequency effectively, and extract the repetitive signals directly related to machine operation condition
而時域同步平均可以有效衰減與回轉頻率無關的干擾，提取與工作狀態直接相關的周期信號。 -
The anti - jamming technology include sidelobe canceller and sidelobe blanking, the effect of these anti - jamming technology are presented also. in the chapter 4 the modeling of targets reflection signals are described, these signals consist of coherent pulse, chirp and barker sequences
第四章討論了雷達回波信號的建模，主要涉及到的信號有相參脈沖信號、線性調頻信號及巴克碼信號，分析了它們各自工作在何種環境下及各自的特點。 -
On the following, on the basis of formulas given above, three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last, the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution
文中主要研究了電離層的三種影響：信號經過電離層傳播的群延遲引起的成像偏移；電離層的色散效應給線性調頻信號帶來二次相位誤差，導致圖像退化、失真；以及電離層的閃爍、湍流等不規則性引起的信號相位起伏。在此基礎上，比較分析了不同波段、帶寬條件下電離層的影響。 -
Awg possesses an essential function of coherence system - " composing frequency and generating image ". therefore as far as spatial frequency field is concerned, awg is an optical integration of coherent system : two slab waveguides similar to two fourier lenses of one dimension and twice fourier transform of optical signals are realized. here the arrayed waveguide region is frequency spectrum region
Awg具有相干系統的「分頻成譜、合頻成像」這一本質功能，因此若從空間頻域的角度來看， awg就是一個相干系統的光學集成：兩個平板波導類似兩個一維傅里葉透鏡，實現光信號的兩次傅里葉變換；而陣列波導區即為頻譜區。 -
Based on the method, exploiting the coherent property of pulse train, the accurate estimation of signals is obtained
以該演算法為基礎，結合相關譜和脈間相參信息，得到正弦脈沖信號頻率的精確估計。 -
After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator, the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm. besides, the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments. 4. in the research on the diversity techniques for fast fading multi - path channels, the dissertation proposes a time - scale rake receiver, and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution
提出了過飽和低復雜度qpsk信號的樹型最佳聯合檢測演算法，並分析了相應最佳接收機的性能及相位偏差對性能的影響等問題；考慮了載波相位和多用戶信碼的聯合檢測問題，通過理論推導給出了過飽和多址系統中多用戶信碼/相位聯合估計子，提出了低復雜度非相干多用戶信碼/相位最佳聯合檢測演算法，並分析了此非相干最佳接收機的誤碼性能及相位提取誤差等有關問題；提出了部分相干多用戶信碼/相位最佳聯合檢測演算法，通過計算機模擬分析了該接收機的誤碼性能及相位提取誤差等有關問題，並與相干、非相干解調兩種情況作了比較，得出了一些有益的結論。 -
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。 -
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。 -
At the same time, computer simulation results also show that music algorithm cannot estimate the doa of coherent signals and adjacent signals with small snr accurately
然後用模擬結果表明music演算法不能估計相關信號doa以及相隔比較近的小信噪比信號doa 。 -
2 a mathematical model of the reflected signal based on the frequency modulation continuous wave ( fmcw ) radar, solving the frequency - azimuth estimation of coherent signals by spatial smoothing technology, comparing the resolution of the object based on two - dim music method and that based on two - dim fft
2討論了在接收dbf條件下，回波信號的二維譜估計技術。建立了基於調頻連續波體制雷達下回波信號的數學模型，並將空間平滑技術推廣到時-空二維譜估計，解決了相干信號源的頻率-方位估計問題。
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