A jointblind estimation method based on spectrum overlap for uplink interleaved orthogonal frequency division multiple access carrier frequency offset and timing synchronization is proposed.
提出了一种基于功率谱叠加的交织正交频分多址系统上行链路载波频偏和定时同步联合估计算法。
2
The small blind hole method is used for the measurement of residual stress inside T joint.
采用盲孔法测定了丁字焊缝的残余应力。
3
This paper introduces the criterion of selecting pump, detonation mode, principle and action of inner blind hole perforator and tubing pump joint technology.