Complete the design of code synchronization module , carry the simulation and analyze the result 對位同步進行算法設計,編程,軟件仿真,結果分析。
Two new speech detection methods based on neural networks using barker coded synchronization signal are presented 提出了兩種采用巴克碼編碼同步信號并基于神經網絡的起點檢測新方法。
Pn code synchronization algorithm based on serial - search acquisition scheme and delay - looked loop tracking is discussed in detail 闡述了基于滑動相關捕獲及延遲跟蹤環跟蹤的偽碼同步技術的設計與實現。
The code synchronization pulse brought from code synchrolock has the synchronization benchmark heart function in the demodulation processing . at the same time , it is the base of frame demodulation and datum processing 位同步器產生的位同步信號起著遙測解調處理“同步基準”的關鍵作用,是后續幀格式解調和數據處理的基礎。
The design of pn code synchronization should find a trade - off between the performance and the complexity of the reciever . in this paper , the pn code synchronization technique in spread spectrum communication is introduced 本論文首先介紹擴頻系統中采用的pn碼同步技術,然后結合wcdma上行鏈路的特點,提出適合wcdma上行鏈路的擴頻碼同步方案。
Secondly , the dissertation presents a 3 - dimensional searching method with afc and pn code synchronization and adaptive array convergence in order to accurately estimate the frequency difference between the received signal and the local oscillator 其次,為了準確估計接收信號和本地振蕩器之間的頻差,提出了afc 、 pn碼同步、自適應陣收斂的三維搜索策略。
It not only considers the effect of frequency error and data modulation , but also realizes code synchronization and frame synchronization at the same time . all these research work will give a valuable reference to the design of the new communication systems 本文對擴頻通信系統構成和原理,擴頻序列設計與優選,擴頻序列同步問題進行了研究,并進行了相應的仿真。
This paper focuses on the blind code synchronization approach and spreading sequences estimation algorithm . the main results can be summarized as follows : 1 . both synchronous and asynchronous dsss / bpsk baseband signal models are established 本文重點是對盲碼同步和擴頻碼序列估計的研究,主要的工作成果如下: 1 、分同步和非同步兩種情況建立了dsss / bpsk基帶信號模型,并介紹了二種非合作式擴頻碼序列估計和解擴的方案。
A modified synchronization approach by using sliding windows is proposed . the pre - processing for obtaining principal eigenvectors is a smoothing procedure for the dsss signal . the computer simulations show that the approach is more convenience in low snr comparing with other code synchronization methods 3 、提出了一種改進滑動窗的盲同步方法,該方法利用求主特征向量的過程,對擴頻信號進行平滑降噪預處理,實現了較低信噪比下的碼同步。
Moreover two types of non - cooperative sequences estimation and despreading schemes are introduced briefly . 2 . several usual blind code synchronization methods , including delay multiply ( sliding autocorrelation ) , maximum norm and average noise reduction approaches are summed up and analyzed by computer simulations 2 、總結和介紹了幾種常用的盲碼同步方法,包括延遲相乘(滑動自相關)法、最大范數法、平均降噪法等,并進行了計算機仿真和分析。