spacing

Through the argumentation of original ponding wall which may has been effected by the explosion of the expansile cutting on the foundation of the prebuilt water gate wall,the author believes that choosing the technical parameter accurately is the way to ensure the implementation of the expansile cutting on the foundation smoothly.

通过对原堵水墙是否受拟建水闸墙基座扩削爆破震动波的影响的论证分析,正确选择爆破技术参数,使基座扩削工程顺利进行,原堵水墙并未因此受到影响,安全得以保障。

The traditional differential space-time block code(DSTBC) suffers from the signal constellation expansion for QPSK modulation.

传统的差分空时分组编码(DSTBC)在QPSK调制时存在着信号星座扩展。

Reducing the OFDM peak-to-average power ratio with improved constellation extension;

用改进的星座图扩展法降低OFDM信号峰均功率比

For time domain synchronous-OFDM(TDS-OFDM) systems with a large number of sub-channels, this paper proposed constellation extension to reduce the PAPR of TDS-OFDM.

针对具有大量子载波的时域同步正交频分复用(TDS-OFDM)系统,提出了应用星座图扩展降低TDS-OFDM系统的峰均功率比(PAPR),同时增加保护间隔的能量以增大信号的平均功率,使得TDS-OFDM的PAPR进一步降低。