| 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. | 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。 |
| 4. | 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。 |
| 5. | When studying the basis expansion approach , a new scheme utilizing pilot signals is proposed , which takes full advantage of high processing gain of dpcch . utilizing fourier transform , the frequencies and the coefficients of basis can be estimated
在基展开方法中，充分利用对dpcch解扩后的系统处理增益为24db的优点，结合基展开的思路，提出了基于基展开的信道非盲估计。 |
| 6. | 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。 |
| 7. | Thirdly , the dissertation presents an anti - interference technology of adaptive array for non - spread spectrum signal using a pilot signal , by which a non - spread spectrum system can use the decoupled 2 - d rake receiver and the original non - spread spectrum system need not be modified
第三，提出了采用扩频信号作为导引信号的非扩频信号自适应阵列天线抗干扰方法。该方法使得非扩频系统可以采用解耦合空时2 - drake接收机，而且不改变原非扩频系统。 |
| 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 viterbi decoder with hard decision designed by the paper , is aimed at ( 3 , 1 , 9 ) convolutional coding . the data rate is 9 . 6kbps . the data rate received by the rake receiver is spreaded by 127 - bit spread sequences , added pilot signals and modulated by qpsk
该课题所设计viterbi译码是针对( 3 , 1 , 9 )卷积码的硬判决译码,数据速率为9 . 6kbps ; rake接收机所接收的数据是扩频因子为127 、加入导频且经qpsk调制的扩频信号,使用verilg硬件描述语言在xilinx公司的ise环境下在用现场可编程门阵列( fpga )来实现viterbi译码器和rake接=收机的功能。 |
| 10. | The principle and characteristics of ofdm system are introduced first . then several key technologies of channel estimation and equalization for ofdm are discussed in detail , including pilot signal based channel estimation methods , cyclic prefix based channel estimation method , frequency domain adaptive filtering method and time domain equalization method for long channel impulse . the corresponding comparison and simulations are also provided
文中讨论了利用导频信号的信道估计方法，利用循环前缀进行信道估计的方法， ofdm信号均衡中自适应滤波技术，及信道冲击响应长于循环前缀时利用时域均衡减少解调器输入信号拖尾长度的方法，分析了这些方法的原理，并通过计算机仿真验证了这些方法的性能。 |
