| 1. | A blind synchronization method based on cyclostationarity is mainly studied
重点研究了基于ofdm信号循环平稳特性的盲同步估计算法。 |
| 2. | Finally , combining with our work , we discuss its trends for future development and application
在此基础上，并结合我们的工作，对基于信号周期平稳特性的盲波束形成的发展作一展望。 |
| 3. | Then , local - wave ( lw ) method is imported especially for solving questions about nonlinear and non - stationary of diesel surface vibration signals
然后，针对柴油机系统的非线性和表面振动信号的非平稳特性，引入局域波分析方法。 |
| 4. | Most radar signals are non - stationary signals , but they are cyclostationary signals , namely , the correlation function of radar signals is periodic function of time
大部分的雷达信号都是非平稳信号,但它们都具有循环平稳特性,所谓循环平稳信号是指相关函数为时间的周期函数的一大类非平稳信号。 |
| 5. | In this dissertation , the blind beamforming algorithms based on signal ' s cyclostationarity are studied . based on several typical blind beamforming algorithms , some improved algorithm are presented
本文的主要目的是研究基于信号循环平稳特性的盲波束形成算法，作者结合现有的几种典型盲波束形成算法，提出了自己的改进算法。 |
| 6. | In succession , fractal is imported especially for solving questions about nonlinear and non - stationary of diesel surface vibration signals . a formula with variation has been set to calculate the fractal dimension of the vibration curve
接着，针对柴油机系统的非线性和表面振动信号的非平稳特性，引入分形分析方法，利用变换法计算振动曲线的分维数。 |
| 7. | Because these methods do not need not only the doa of the signal ' s and the array manifold but also signal waveform , the blind beamforming algorithms using cyclostationarity signal ' s properties are the genuine blind algorithms
该方法既不需要知道来波方向和阵列流形，也不需要提供训练数据，仅利用信号的循环平稳特性就可以实现真正意义上的盲自适应波束形成。 |
| 8. | For dsss signals , we proposed two algorithms , one is a hypothesis test algorithm that can be used to detect if there are dsss signals , the other is a symbol period estimation algorithm using the cycle - stationary feature of dsss signals
对直序扩频( dsss )信号，本文提出了一种假设检验算法检测其存在性；利用dsss信号的循环平稳特性，提出了估计dsss信号符号周期的方法。 |
| 9. | Because the ds - ss signals have cyclic features , the cyclostationary theory has been applied in the detection and parameter estimation of the signals , which is accomplished by exploitation of cyclic feature of signal through cyclic spectral analyzers
由于直接序列扩频信号( ds - ss )具有循环平稳特性,通过循环谱分析来发掘信号的周期循环特性,循环平稳理论可以用来进行信号的检测和参数估计。 |
| 10. | Then the proposed method is applied to the uplink of the multiuser ofdm ( ofdma ) . two synchronization methods based on cyclostationarity are proposed here for two different subcarrier allocation modes . the simulation results demonstrate the good performances of the proposed estimators
针对多用户ofdm系统中载波分配方式的不同，对两种分配方式分别提出了基于ofdm信号循环平稳特性的同步估计算法，通过仿真看出算法具有良好的估计性能。 |
