相空

扫相空时比特交织编码调制

Phase Sweep Space - Time Bit Interleave Coded Modulation

双相不锈钢空冷器管头自动氩弧焊焊接工艺

Welding Technology of Duplex Stainless Steel Air-cooler 's Shoe Automatic Argon Arc Welding

双相复空型及其几何特征

Binary Complex Space Form and its Geometric Properties

空间分集与编码调制技术相结合的空时编码技术，可以获得分集和编码增益，具有优异的抗衰落性能。

Space-time coding was proposed by combining space diversity and coding technology to improve the system performance .

针对单传感器接收性能受水声信道衰落特性影响较大的问题，通过判决反馈均衡与分集技术相结合的空时联合均衡，采用快速优化最小均方（FOLMS）算法，实现了分集通信仿真。

In order to cope with fading effects , a joint diversity combination and decision-feedback equalization method is introduced for underwater communications .

多输入多输出天线既是一种空间分集技术，将多天线中的空时分组编码与正交频分复用技术相结合构成空频分组编码，在多径衰落信道条件下还可以获得额外多径分集增益。

Multiple Input Multiple Output ( MIMO ) antenna is a typical spatial diversity technique , by combining multiple antennas space-time block coding with orthogonal frequency division multiplexing ( OFDM ) forming space-frequency block coding , In multipath channel fading conditions , which also can get additional frequency diversity gain .

将此检测准则与最小二乘迭代方法相结合，在空时多径CDMA系统中构造出自适应RLS-LMF多址检测算法，继承了前者的稳态解相关性能和后者的计算有效性。

In multipath CDMA channels , the LMF criterion is combined with the recursive least-square method and the RLS-LMF algorithm is further developed to construct a space-time receiver .

输出时钟信号还具有可编程的相移和占空比调节等高级时钟变化功能。

The output clock signal has advanced clock shift ability such that the phase shift and duty cycle are programmable .

雷达系统不可避免地存在通道幅相误差，导致空时自适应处理算法的性能下降。

The channel gain and phase errors are inevitable in radar systems and the result in performance degrading of space-time adaptive processing ( STAP ) algorithm .

本文还提出了一种延时分割方法以提高用于实现相移和占空比调节功能的后端分频器的速度。

A new delay partition method is also adopted to improve the speed of the post-scale counter , which is used to realize the programmable phase shift and duty cycle .

在高开关频率下，应用状态空间平均法建立三相电压型PWMVSR数学模型，利用矢量合成原理，推算出各相开关函数占空比。

The mathematical model of 3-phase PWM VSR using state space average method is studied under the high swith frequence at frist , then the pulse time ratio is given using the space vector technology .