| 1. | Complete the design of code synchronization module , carry the simulation and analyze the result
对位同步进行算法设计,编程,软件仿真,结果分析。 |
| 2. | Two new speech detection methods based on neural networks using barker coded synchronization signal are presented
提出了两种采用巴克码编码同步信号并基于神经网络的起点检测新方法。 |
| 3. | Pn code synchronization algorithm based on serial - search acquisition scheme and delay - looked loop tracking is discussed in detail
阐述了基于滑动相关捕获及延迟跟踪环跟踪的伪码同步技术的设计与实现。 |
| 4. | 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
位同步器产生的位同步信号起着遥测解调处理“同步基准”的关键作用,是后续帧格式解调和数据处理的基础。 |
| 5. | 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
本论文首先介绍扩频系统中采用的pn码同步技术,然后结合wcdma上行链路的特点,提出适合wcdma上行链路的扩频码同步方案。 |
| 6. | 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，为了准确估计接收信号和本地振荡器之间的频差，提出了afc 、 pn码同步、自适应阵收敛的三维搜索策略。 |
| 7. | 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
本文对扩频通信系统构成和原理,扩频序列设计与优选,扩频序列同步问题进行了研究,并进行了相应的仿真。 |
| 8. | 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
本文重点是对盲码同步和扩频码序列估计的研究,主要的工作成果如下: 1 、分同步和非同步两种情况建立了dsss / bpsk基带信号模型,并介绍了二种非合作式扩频码序列估计和解扩的方案。 |
| 9. | 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 、提出了一种改进滑动窗的盲同步方法,该方法利用求主特征向量的过程,对扩频信号进行平滑降噪预处理,实现了较低信噪比下的码同步。 |
| 10. | 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 、总结和介绍了几种常用的盲码同步方法,包括延迟相乘(滑动自相关)法、最大范数法、平均降噪法等,并进行了计算机仿真和分析。 |
