相位偏差 meaning in English
phase deviation
Examples
- Research on phase aberration of ultrasonic phased array echo signal
超声相控阵回波信号相位偏差的研究 - On the basis of previous work , we developed a new data processing system by use of dsp & oop . the new system overcame the problems existed in the old data processing system successfully , such as the bug which cause program dead loop when the data is too long , and the frequency leak due to principle limit of fft filter . in addition , we eliminated the measurement error brought on by phase warp
我们在前人的工作基础上，利用现代数字信号处理技术和面向对象的软件开发技术，统一了弹上黑匣子数据处理系统的操作平台，完善了转速、扫描角测试数据处理系统，修正了原有处理程序中的因数据长度过长而导致程序死锁的bug ；利用有限冲击响应( fir )滤波器，在滤去噪声的同时，有效地解决了矩形窗fft滤波的频谱泄漏问题；另外还解决了因相位偏差而导致的测试误差。 - After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator , the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm . besides , the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments . 4 . in the research on the diversity techniques for fast fading multi - path channels , the dissertation proposes a time - scale rake receiver , and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution
提出了过饱和低复杂度qpsk信号的树型最佳联合检测算法，并分析了相应最佳接收机的性能及相位偏差对性能的影响等问题；考虑了载波相位和多用户信码的联合检测问题，通过理论推导给出了过饱和多址系统中多用户信码/相位联合估计子，提出了低复杂度非相干多用户信码/相位最佳联合检测算法，并分析了此非相干最佳接收机的误码性能及相位提取误差等有关问题；提出了部分相干多用户信码/相位最佳联合检测算法，通过计算机仿真分析了该接收机的误码性能及相位提取误差等有关问题，并与相干、非相干解调两种情况作了比较，得出了一些有益的结论。 - For carrier synchronization , a method of estimating the ofiset of carrier frequency has been presented , which has a more broad range of the estimated oflset of carrier fiequency and more accurate result man other methods , then , a method of estimating the carrier complex phase has been presented , which corrects directly the ofiset of carrier phase
对于全数字接收机中的载波恢复，先提出了一种估计范围宽、估值精度高的载波频偏估计算法，接着介绍了一种可以直接对载波相位偏差进行补偿的复相位估计方法。