| 1. | A channel over which pilot signal is transmitted
可在其上传输导频信号的一种信道。 |
| 2. | Tps tracking pilot signal
跟踪导频信号 |
| 3. | The aim of this paper is to investigate the problem of pilot - assisted channel estimation in downlink mc - cdma
本文主要研究了mc - cdma下行链路中的基于导频信号的信道估计。 |
| 4. | In chapter five an anti - interference method of adaptive array for ssb signal that uses a pilot signal is presented
第五章简单介绍了利用导频信号实现单边带( singlesideband )信号自适应天线抗干扰的方法。 |
| 5. | In this modified algorithm , channel estimation is made by dispreading the received signal of dpcch with a corresponding long gold sequence and pilot ovsf , followed by averaging
本文将dpcch中的导频信号解扰、解扩，再将它们与已知导频信号相乘得到的信道估计值进行平均，从而得到最终的信道估计值。 |
| 6. | To estimate the channel well , we introduced a pilot signal aided modulation ( psam ) technology , and utilize certain interpolation way to get the statistical effect of channel , hence afford loss compensation for signal demodulation
为解决信道估算的问题，本课题引入导频信号辅助调制，应用一定的插值法，得到信道的统计特性，对信号解调进行衰落补偿。 |
| 7. | The method of optimal parametric feedforward estimation of fading channels , which is used in tdma systems originally , is modified to cope with matrix singularity because the number of pilot signals is small in wcdma systems
当应用于wcdma系统时，因为wcdma系统的导频信号数远远少于tdma系统的导频信号数，所以在用最小二乘方法估计信道时，无法满足导频信号数大于两倍多径数的条件，导致矩阵不可逆。 |
| 8. | To overcome the affection of ici and awgn on the ls estimate of the transfer function at pilot tones , the proposed bispectrum - based channel estimation algorithm employ the suppression of ici and awgn components in the received pilot signals by bispectrum and then the accuracy of the estimation is improved . with the channel estimation at pilot tones , an efficient interpolation is necessary . an improved interpolation method based on transform - domain filtering is proposed , which employs dft / idft and filtering in a transform domain so that the effect of noise on the equalization is significantly reduced
针对导频处信道传递函数的ls估计中存在载波间干扰和加性高斯白噪声的影响的这一问题，本文将传统的ls估计方法与双谱相结合提出了一种新型的基于导频双谱信道估计算法，它利用了双谱对高斯噪声的抑制作用来减小接收到的导频信号中的载波间干扰和加性高斯白噪声的影响，从而提高了导频子载波上信道估计的精度。 |
| 9. | The key is that the head - end emits the guide m sequence , which is non - correlative with any users " address code . the phase of all users address code and the head - end address code are combined with the guide m sequence . every user address code phase can attain after the guide m sequence phase is searched and tracked
论文所提出的方案是通过前端发射固定的导频信号，并且在前端和用户端都把用户地址码相位捆绑在导频相位上，使得用户在同步捕获和跟踪导频相位后，间接得到用户的地址码相位。 |
| 10. | And pays emphasis on analyzing the system structure and system flow , the core techniques , the channel characteristic and parameters of dvb - t system . the system adopts some core techniques such as cofdm , a lot of tps ( transmission parameter signalling ) insert and guard interval , and so on . so it can withstand high - level ( up to odb ) , long delay static and dynamic multipath distortion
论文首先描述了数字电视地面广播的需求条件，技术难点和目前存在的问题，并重点分析了dvb - t系统结构流程，核心技术及系统信道特性和参数，该系统采用了cofdm (编码正交频分多路复用) ，大量导频信号插入和保护间隔技术等核心技术，使之能抵抗高电平( 0db ) ，长延时的静态和动态多径失真，有利于数字和模拟电视的混合传输，它的多载波调制模式功能和性能在移动和便携接收、同频网等方面具有独特的优势。 |
