frequency channel的例句大全

A channel estimation scheme was presented in single-carrier frequency domain equalization systems with space-time block coded transmission over frequency-selective fading channels.

在频率选择性信道下给出了单载波频域均衡系统结合空时分组编码传输基于训练序列的最优信道估计算法。

It is used as a local oscillator for frequency synthesizer translation and channel selection.

它通常作为本振信号用于变频或者信道选择。

Considering the shortage of VHF ( Very High Frequency) radio frequencies in aeronautical telecommunication in China, a method of decreasing channel spacing from 25 kHz to 8.33 kHz is presented.

针对我国航空通信中VHF（Very High Frequency）频率资源紧张的现状，提出将信道间隔从25kHz减小到8.33kHz的解决方法。

The results show that the effect of high frequency pump noise is greater than the low frequency ones, moreover, the consumption and fluctuation of pump powers will make the performance of the system with larger channel spacing degrade further.

研究结果表明，相对于低频泵浦噪声，高频泵浦噪声对系统性能的影响更大一些，并且泵浦的损耗和波动可以使信道间隔大的系统性能进一步恶化。

Shortwave communication channel have the characteristics of multipath debilitating and Doppler frequency shifting.

针对短波通信信道的多径衰落和多普勒频移特性，研究了同步和信道均衡的相关算法。

In our approach, the T-F units in high frequency range are merged into segments by using combined auditory cues ( including cross-channel correlation, temporal continuity, and onset/ offset).

在该方法中，我们根据组合线索（包括互通道相关、时域连续性、起始和终止）将高频区域的时频单元合并成听觉片段。

Based on channel mismatches characteristic, the channel mismatches self-adaptive synthesis estimation model was established. This dissertation gave self-adaptive time skew error estimation algorithm based on frequency domain.

研究了通道失配误差的特点，建立了通道失配误差自适应综合估计模型，分别给出了频域和时域自适应估计算法。

Frequency Offset Tracking Algorithms Base on Cost Functions For OFDM in Wireless Channel

无线信道中基于代价函数的OFDM频偏跟踪算法

BK channel, Ca2+-activated voltage-dependent K+ channel plays a crucial role in modulating a number of important physiological processes, such as neuronal excitability, frequency tuning of hair cells, smooth muscle contraction, and immunity.

BK通道（Ca2+激活的电压依赖的K+通道）在很多重要的生理过程中起着非常重要的作用，比如神经兴奋性，耳毛细胞的频率调节和平滑肌细胞的收缩和免疫。

In TDD pre-equalization OFDM systems, the Doppler frequency shift would make channel time-variant, degrade system performance.

对于TDD预均衡OFDM系统，多普勒效应导致了信道的时变，并使预均衡处理产生误差，且随处理时延的增大，预均衡系数误差越大，由此影响了预均衡系统的性能。

OFDM as well as multi-channel-coding and multi-modulation is adopted by DRM. This combine with interleaving and error protection to decrease the effect of frequency selective fading, multi-path time delay and Doppler effect. Then the robustness of the signal transmitted is enhanced.

DRM采用OFDM调制方式和多级信道编码，使用交织、差错保护技术，大大地减轻了频率选择性衰落、多径时延以及多普勒效应的影响，提高了信号传输质量和稳定性。

On the basis of the characteristics of the LEO channel, a pilots-aided frequency offset estimation algorithm for OFDM systems is proposed.

针对LEO信道多径衰落的特性，提出了OFDM系统频率偏差估计算法。

In the dissertation, researching the defects that Peak-to-Average Ratio ( PAR) is high and influenced greatly by frequency offset and time-varying channel in OFDM system, providing the effective settlement measures.

论文针对OFDM技术峰值平均功率比高以及易受频率偏差和时变信道的影响的缺点进行研究，给出有效的解决措施。

The design and development of two-channel automatic frequency tuner for hydrogen maser cavity

双通道氢脉泽腔体频率自动调谐器的设计和制作

Design and Realization of High Frequency Receiver with Three-Channel for a Radar

某雷达三通道高频接收机的设计与实现

This paper employs the tapped delay line channel model for frequency-selective fading channels to extend a frequency offset blind estimation algorithm based on cyclostationary, which is proposed for flat fading channels, to frequency-selective fading channels. Simulations proves the feasibility of this extension.

根据频率选择性衰落信道的抽头延迟线模型，将针对平坦衰落信道的CS（周期平稳过程理论）频偏盲估计算法扩展到了频率选择性衰落信道，并通过仿真证明这种扩展是可行的。

The proposed algorithms completely avoid matrix inversion by performing channel prediction on time domain and recursive channel estimation on frequency domain.

所提算法通过在时域上进行信道预测，在频域上进行递推估计，完全避免了矩阵求逆运算，有效降低了计算复杂度。

in wireless digital transmissions, due to the delay dispersion of the transmitted symbols and the limitation of channel bandwidth, the channel may induce inter-symbol interference ( isi), which results the frequency selective fading.

在无线数字传输中，由于时延扩展和信道带宽限制，引起码间串扰，产生频率选择性衰落。

by analyzing the pairwise error probability ( pep), we prove that the dsf ofdm system can achieve full diversity gain and maximum coding gains over frequency selective fading channel by choosing optimum rotation matrix.

成对错误概率分析表明：在频率选择性信道中，通过选择最佳的旋转矩阵，这种DSF OFDM系统能实现满分集增益和最大的编码增益。

dynamic and static information of natural electric field frequency selection method applied to confirm underground water stream channel

利用天然电场选频法的动、静态信息确定地下径流通道