因此，选择性估算的准确性显然基于您运行UPDATESTATISTICS的频率。
So it is obvious that the accuracy of selectivity estimation depends upon how often you run UPDATE STATISTICS.
研究了频率选择性瑞利衰落信道中的同步MC-CDMA系统上行链路空时信道估计及多用户检测算法。
The space-time channel estimation and multiuser detection algorithm for the uplink of multicarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel were investigated.
另外在未来宽带MIMO无线通信系统中，通常面临频率选择性衰落信道，传统高性能均衡器就会变得异常复杂。
In addition, there will be frequency selective fading in the future broadband MIMO wireless communication systems, and the traditional high-performance equalizer will become extremely complicated.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
该文研究在频率选择性瑞利衰落信道中MC-CDMA系统的盲空时干扰抑制。
This paper investigates blind space-time interference suppression for MultiCarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel.
该文研究了频率选择性瑞利衰落信道中的异步ds - CD MA系统盲多用户检测。
This paper investigates blind multiuser detection for asynchronous DS-CDMA in frequency selective Rayleigh fading channel.
新的方向滤波器组具有良好的方向和频率选择性。
The new DFB can provide good directional and frequency selectivity.
表层传播一般都有频率选择性。
The superficial layers are often frequency selective to transmission .
提出一种基于信号子空间估计，用于频率选择性衰落信道的盲多用户自适应接收机。
In this paper, a blind multiuser receiver for frequency-selective fading channel based on subspace tracking has been presented.
对于无线通信系统，无线信道不仅是频率选择性的，而且是时变的。
However, for the wireless mobile communication systems, the radio channel is frequency selective and time-varying.
对于整数频偏估计，分析了一种基于序列自相关的算法，并将该算法推广应用到频率选择性信道中；
For integer frequency offset estimation, we analyze a sequence auto-correlation based algorithm, and extend the algorithm into frequency selective channel case.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
对在多用户和频率选择性瑞利衰落环境下的下行链路的误比特率性能进行了仿真，其结果表明系统是可行的。
The simulation of error bit rate performance for multi -channel and frequency -selective Rayleigh fading is carried out, and the simulation results show that the system is.
在频率选择性信道中，新编码策略可以获得空时频全分集增益。
The new coded strategy can achieve full space-time-frequency diversity over frequency selective fading channel.
指出了结构对地震动的频率具有选择性，结构的响应与瞬时能量谱之间具有密切的对应关系。
The feature that structures have the selectivity to the earthquake motions frequency and structure response has the close corresponding relation with instantaneous energy spectrum is pointed out.
并针对频率选择性信道采用了多符号平均改善算法性能。
In order to improve performance of this method over frequency selective channel, we average over several symbols.
下丘神经元的频率及强度选择性受频谱整合作用的调制。
The acoustic responses selectivity of IC neurons to frequency and intensity were modulated by frequency spectral integration.
两个衰减极点分别产生在靠近通带的两边，提高了通带频率的选择性。
Two sharp attenuation poles can be located close to either side of the desired pass-band to improve the frequency selectivity.
技术可以和OFDM技术结合以便在高的频率选择性衰落信道下提供高数据率的传输。
V-BLAST (Vertical Bell Laboratories Layerd Space-Time) can be combined with OFDM to achieve high data rate transmission in frequency selective fading channels .
表层传播一般都有频率选择性。
The superficial layers are often frequency selective to transmission.
其次重点研究了移动传播环境的频率选择性信道的建摸方法，并给出了模型的硬件实现结构和仿真结果。
Then it introduces the modeling method of frequency selection channel in mobile transmission environment. It also gives the model hardware implementation architecture and simulation results.
因此在频率选择性衰落信道中，采用分集接收可以改善系统的捕获性能。
Therefore, system acquisition performance can be improved if diversity receiver is adopted for the frequency-selective fading channel.
频率选择性衰落信道采用了两径模型。
A two-ray model is used for the frequency selective fading channel.
高数据传输速率以及终端的高速移动，导致无线通信信道具有时间选择性与频率选择性两个特征。
High data transmission rates and high mobility give rise to time - and frequency - selectivity in wireless communication channels.
且耦合电容具有频率选择性。
仿真结果表明，将空时编码技术与M IMO-OFDM技术相结合能有效地抵抗频率选择性随机衰落。
The results of simulation show that space-time block code based on MIMO-OFDM is a highly effective technique against the frequency-selective random fading.
跳频同址干扰具有频率选择性，是典型的长脉冲响应干扰。
Frequency-selective frequency hopping(FH) cosite d interference is a typical long impulse response interference.
OFDM技术可以把频率选择性衰落的信道转化成一组正交的平坦衰落的信道，因此可将OF DM技术应用在MIMO系统中来克服多径衰落的影响。
OFDM has the ability of transforming the frequency-selective channel into a collection of parallel flat-fading subchannels and therefore can be adopted in MIMO systems to combat multi-path effects.
本文主要研究了基于训练序列的多输入多输出（MIMO）时变频率选择性衰落信道的估计与跟踪问题。
The problem of channel estimation and tracking for MIMO time-varying frequency-selective channels is investigated based on training sequences.
频率选择性快衰落信道的精确估计对接收机性能的提高起着重要作用。
The receiver performance can be greatly improved by precisely estimating frequency-selective fast-fading channel information.
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