Complete the design of code synchronization module , carry the simulation and analyze the result 對位同步進(jìn)行算法設(shè)計,編程,軟件仿真,結(jié)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(jīng)網(wǎng)絡(luò)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(guān)捕獲及延遲跟蹤環(huán)跟蹤的偽碼同步技術(shù)的設(shè)計與實現(xiàn)。
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(chǎn)生的位同步信號起著遙測解調(diào)處理“同步基準(zhǔn)”的關(guān)鍵作用,是后續(xù)幀格式解調(diào)和數(shù)據(jù)處理的基礎(chǔ)。
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(kuò)頻系統(tǒng)中采用的pn碼同步技術(shù),然后結(jié)合wcdma上行鏈路的特點,提出適合wcdma上行鏈路的擴(kuò)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(zhǔn)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(yīng)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(kuò)頻通信系統(tǒng)構(gòu)成和原理,擴(kuò)頻序列設(shè)計與優(yōu)選,擴(kuò)頻序列同步問題進(jìn)行了研究,并進(jìn)行了相應(yīng)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(kuò)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(kuò)頻碼序列估計和解擴(kuò)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(jìn)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(kuò)頻信號進(jìn)行平滑降噪預(yù)處理,實現(xiàn)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(jié)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(guān))法、最大范數(shù)法、平均降噪法等,并進(jìn)行了計算機(jī)仿真和分析。