Complete the design of code synchronization module , carry the simulation and analyze the result 對(duì)位同步進(jìn)行算法設(shè)計(jì),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(hào)并基于神經(jīng)網(wǎng)絡(luò)的起點(diǎn)檢測(cè)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(dòng)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(jì)與實(shí)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(hào)起著遙測(cè)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(diǎn),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(jì)接收信號(hào)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(duì)擴(kuò)頻通信系統(tǒng)構(gòu)成和原理,擴(kuò)頻序列設(shè)計(jì)與優(yōu)選,擴(kuò)頻序列同步問(wèn)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(diǎn)是對(duì)盲碼同步和擴(kuò)頻碼序列估計(jì)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(hào)模型,并介紹了二種非合作式擴(kuò)頻碼序列估計(jì)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(dòng)窗的盲同步方法,該方法利用求主特征向量的過(guò)程,對(duì)擴(kuò)頻信號(hào)進(jìn)行平滑降噪預(yù)處理,實(shí)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(dòng)自相關(guān))法、最大范數(shù)法、平均降噪法等,并進(jìn)行了計(jì)算機(jī)仿真和分析。