coherent receiver 中文意思是什麼
coherent receiver
解釋
相干檢波接收機-
The improved algorithm has three steps : 1 ) estimating the statics ; 2 ) selecting the best coherent time window from the common - receiver - point stack profile for the coherent computation and calculating the statics ; 3 ) correcting the value of " statics " by the underground structures corresponding to the formation of the p waves
演算法可以分3步進行：估算靜校正量；在共接收點疊加剖面上選擇一個最優相千時窗進行相干運算，求取靜校正量；根據縱波對應層位的地下構造對相於結果進行校正。 -
And their performances are compared by simulation. the realization of phase - coherent modulation is studied, especially the carrier recovery. in order to improve the system performance, we consider a receiver which performs optimal phase synchronization and channel equalization jointly
本文詳盡的研究了線性和非線性自適應均衡器的橫向結構和典型演算法（ lms和rls ） ，對其性能進行了模擬比較；對相位相干調制解調技術的實現，尤其是載波恢復的方法進行研究，將載波恢復系統和自適應均衡器的參數調整聯合起來，從而提高相干水聲通信系統的性能。 -
However, the high demand in frequency domain involves precise synchronization both in time and frequency domain. while because of the different channel characteristics in each channel, the receiver needs some mechanisms to characterize the channel effects in coherent demodulation
然而，頻域的高要求對應于同步技術的高要求；另外，各個子通道不同的通道特徵，要求接收端相關解調用一定的機制來近似每個子通道的通道特徵。 -
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。 -
Second, this paper design the simulation scheme of bicm for comparing the performance over fading channel and awgn channel that combine 2 / 3 rate, 4 states punctured convolutional code with 8psk modulation, matching block interleave or random interleave, transform through rayleigh channel or awgn channel and use the way that combine coherent demodulation with viterbi decoding in receiver. design the scheme of bicm _ id that use the iterative decoding technique and the scheme of tcm for compare
為了驗證bicm和bicm _ id在衰落通道和加性高斯白噪聲通道（ awgn ）下的性能，設計了一個2 / 3碼率， 4狀態的鑿孔卷積碼經過塊交織或隨機交織，與8psk調制相結合，在rayleigh通道下或awgn通道下傳輸，接收端採用相干解調與維特比譯碼相結合的bicm方案，在接收端引入迭代反饋譯碼的bicm _ id方案，以及與之相比較的tcm方案。 -
The frequency offset estimation algorithms for gmsk signal are also discussed and a frequency offset estimator with larger estimation range and higher accuracy is proposed. two kinds of synchronization structures are compared with each other. at last, the synchronizer described above and a differentially coherent demodulator compose a blind gmsk receiver
其次，基於對目前gmsk信號盲載頻偏差估計方法的分析和比較，根據第五章提出的頻差估計思想，提出一種寬估計范圍、高精度的gmsk信號頻差估計方法。 -
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。 -
At the same time the case of coherent signal sources is also discussed and an algorithm for estimating 1 - d angle - of - arrival from under - sampled data is proposed in the thesis. moreover, a system of digital signal processing receiver using spatio - temporal undersampling technique is described and some practical problems are also discussed
在理論分析的基礎上，結合某實際研究項目，論文給出了基於空時欠采樣條件下一種偵察測向數字信號處理機的硬體實現，並就工程實現中的一些問題進行了討論。 -
A special structure of coherent receiver is proposed which combine the advantages of the parallel and serial structure. the design of m - ary spread spectrum system is proved in the system of ( 32, 5 ) which is small in scale
本文把提出的一些新的設計思路應用於多進制擴頻系統（ 32 ， 5 ） ，通過該系統的設計和實現，證實了其可行性和可靠性。 -
Hence, in this paper, we present some research wok in the three topics mentioned above : in the topic of distributed mimo detection, we propose a coherent receiver model for distributed mimo systems to solve the asynchronous reception problem in the downlink
本文擬在上述三個方面做一些工作:本文針對分佈mimo系統的下行鏈路中，發射信號異步到達接收機的問題，提出了一種分佈mimo相干接收機模型。 -
Based on the proposed receiver model, transmit signals can be recovered from a single receive antenna ; moreover, by adopting the coherent receiver model, some existing signal detection algorithms in traditional mimo systems can be extended to distributed mimo systems
採用該接收機模型，可以從單個接收天線恢復出發射信號;並且基於該接收機模型，集中mimo中眾多成熟的信號檢測演算法可推廣到分佈mimo檢測中。
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