frequency diversity
英 [ˈfriːkwənsi daɪˈvɜːsəti]
美 [ˈfriːkwənsi daɪˈvɜːrsəti]
频率疏散（分隔，分集制），散频
双语例句
- A frequency diversity ARQ scheme for OFDM systems
一种用于OFDM系统的频率分集ARQ方案 - Simulation testifies that within a certain range the method is a good way of filling blind zone for ground-based radar by adopting frequency diversity in the case of multipath.
仿真结果表明，对于探测低空巡航导弹的地基雷达，在一定的距离范围内，采用频率分集可以较好地克服多路径效应探测盲区。 - Moreover the combined performance of frequency diversity and time diversity can be gained by using time-frequency RAKE receiver.
接收端使用时频RAKE接收机，可以使系统具有频偏分集和时延分集的性能。 - An additional frequency diversity gain can be obtained with OFDM-CDM by spreading each data symbol over different subcarriers.
OFDM-CDM系统将信号扩展到不同的子载波上，可以达到很好的频率分集的效果。 - This method is suitable for identifying PRF jittering, PRF staggering, frequency agility and frequency diversity etc.
可分选出的信号有抖动信号、重频参差、频率捷变及频率分集信号等。 - Parallel interference cancellation was proposed for multi-carrier DS CDMA ( which is termed FDC-PIC) by integrating frequency diversity combining with parallel interference canceling method.
将频率分集合并技术与并行干扰抵消算法相结合，提出了多载波DSCDMA系统的并行干扰消除算法（FDC-PIC），并对这一算法的误码性能进行了计算机仿真。 - Design of Frequency Diversity Radar Receiver
频率分集雷达接收机的设计 - Frequency Diversity to Suppress Glint in Wide-Band MMW Radar
频率分集技术对宽带毫米波雷达目标角闪烁的抑制 - The structure of such kind of MC-CDMA system is improved by introducing interleaver in frequency domain, ensure that fades among frequency diversity components are independent, so the anti-fade ability has been improved.
改进了这种MC-CDMA系统的结构，通过在频域引入交织器，使交织后频率分集各分量经历独立的哀落，从而提高了抗哀落能力。 - Analysis and Performance of Multicarrier Frequency Diversity Spread Spectrum Code Division Multiple Access Communication System
多载波频率分集扩展频谱码分多址通信系统及性能分析 - A new method of radar waveform design and signal processing, which replace: the long code with frequency diversity shorter codes, is investigated to improve the Doppler tolerance and near-range sounding of biphase coded signals with large compression ratio.
提出以频率分集的短码代替长码的雷达波形设计和信号处理方法，改善了大压缩比二相编码信号的多普勒容限和近距探测性能。 - This provided the foundation for advance study and brought forward the high removes resolution and frequency diversity.
提出用高分辨率和频率分集解决多径效应问题。 - This technology will have brilliant future for its efficiency in canceling ISI and its advantage of frequency diversity.
这一技术能有效地抗多径引起的符号间干扰（ISI），并且有频率分集的优点，在移动通信领域中具有广阔的应用前景。 - How to retrieve transmitted signals from received signals concerned with frequency diversity and equalization.
如何从接收到的信号恢复出发送信号，涉及到频率分集接收和均衡。 - In this paper, the frequency diversity reception of multi-carrier CDMA signal is studied.
本文研究了多载波码分多址（Multi-carrierCDMA）扩展频谱系统在多径衰落信道下的频率分集接收技术。 - We further compare in matched filtering performance several modulation pulses in time-varying multipath Rayleigh fading channels, with the result that the rectangular pulse can achieve the best time and frequency diversity.
进一步比较了几种调制脉冲波形在时变多径Rayleigh衰落信道下的匹配滤波性能，发现矩形脉冲可以取得最好的时频分集。 - This paper presents a method to improve the Doppler-tolerance by combining the frequency diversity and non-coherent sidelobe reduction filters.
针对相位编码信号的多普勒频移灵敏问题，提出了频率分集处理和非相干型旁瓣抑制滤波器相结合的方法，以改善多普勒性能。 - The common diversity be classified as space diversity, polarization diversity, frequency diversity, and time diversity etc.
通常的分集有空间分集、极化分集、频率分集、时间分集等，本文对分集研究技术的研究主要是空间分集和极化分集在数字域的实现等。 - On Waveform Design of Frequency Diversity Biphase Coded Signals
频率分集式二相编码信号的波形设计及处理研究 - Linear precoding is an efficient approach to increase frequency diversity order for OFDM systems over frequency-selective channels.
线性预编码是OFDM系统在频率选择性衰落信道中利用频率分集的有效方法。 - Space, or multiple-antenna, diversity combined with other diversity, e.g., time and frequency diversity, can improve the system performance without adding the transmission time and bandwidth.
空间、多天线分集可以与其它分集技术，如时间、频率分集技术有效的结合，在不增加传输时间和带宽的条件下，提高系统性能。 - Joint coding technology to send data stream by treating joint coding done to improve the system diversity gain, cyclic delay each antenna technology to transmit data on the cyclic shift, equivalent exacerbated the frequency selective channel excavated frequency diversity system.
联合编码技术通过对待发送数据流做联合编码处理来提高系统分集增益，循环延迟技术对每个天线上的发送数据进行循环移位，等效加剧了信道的频率选择性，挖掘了系统的频率分集。 - This method uses both frequency diversity and spatial diversity technologies, which can reduce the probability of multipath cancellation effectively.
该方法利用频率分集和空间分集技术，能够有效的降低多径对消的概率。 - The combination of these two technologies makes good use of space diversity, frequency diversity and time diversity to improve the system capacity and the ability of anti-interference.
两者的结合充分利用了空间分集、频率分集和时间分集来改善系统的容量和抗噪声性能。 - The in-band frequency diversity is used to overcome the effect caused by the frequency-selective fading in system designs.
为了克服短波信道频率选择性衰落带来的影响，带内频率分集技术被用于系统的设计。 - It can obtain time diversity, spatial diversity and frequency diversity at the same time. So it not only can effectively combat the frequency selective fading in the course of spread, but also the spectrum efficiency is greatly improved.
它将时间分集、空间分集和频率分集有机地结合起来，不仅可以有效地抵抗信号传播过程中遭遇的频率选择性衰落，而且频谱利用率得到很大地提高。 - In order to increase the frequency selectivity of the channel, this scheme introduces different cyclic delays into the OFDM symbols. In this approach, the frequency diversity gain and the BER performance of this scheme could be greatly improved.
该方案通过在多天线的OFDM调制信号中引入不同的循环延迟，增加了信道的频率选择性，提高了频率分集增益，能够很大程度的改善系统的误码率性能。 - 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.
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。 - Employing MIMO technology in IR-UWB communication system will have achieved considerable spatial and frequency diversity, greatly improved the performance of IR-UWB, such as BER, coverage radius, and power consumption.
将MIMO技术用于IR-UWB系统，取得了可观的空间和频率分集，极大地改善了IR-UWB的性能，如BER，覆盖半径和能耗。 - The signal and clutter model that is applicable to both code diversity and frequency diversity is established. And the system NDoF and clutter NDoF of both diversities is estimated in the case of ideally orthogonal transmit waveforms.
建立了码分正交和频分正交的信号与杂波模型，得到了发射波形理想正交时这两种正交方式的系统自由度和杂波自由度。