1) multipath fading
多径衰落
1.
Grouping space time coding OFDM transmission scheme for multipath fading channel;
多径衰落信道中分组空时编码OFDM传输方案
2.
Research on nonlinear dynamical characteristics of multipath fading channels;
多径衰落非线性动力特征初探
3.
The performance of transmit diversity in the flat Rayleigh single-path channel and multi-path fading channel by the combination of STBC and traditional beamforming was investigated,and a new scheme of relizing space and time decoding was proposed in the multipath fading channel.
研究了空时分组码与传统的波束赋形结合在平坦瑞利单径信道及多径衰落信道下的发射分集的性能,并在多径衰落信道下提出了一种新的实现空时译码的方案。
2) Multi-path fading
多径衰落
1.
For a wide band ground-air communication system with a low elevation antenna,the channel is of severe multi-path fading,whereas its characteristic is quite different from that of a terrestrial mobile communication channel.
低仰角下的宽带地空通信信道存在严重的多径衰落现象,其信道特性与地面移动通信的情况很不相同,不适于采用正交频分复用技术,为此建立了低仰角下的宽带地空信道模型,并提出了一种正交码分复用与分组编码技术相结合的通信系统方案。
2.
Multi-path fading is faced when wireless signal spreads in complicated wireless channel.
无线信号在复杂无线信道中传播会产生多径衰落,利用分集接收技术,即在若干支路上接收相关性很小的载有同一消息的信号,通过合并技术将各信号合并输出,能达到在接收端大大降低深衰落概率的目的。
3.
For its robust performance in combating multi-path fading, it is adaptable to use in the wireless mobile communication channel and is widely focused on.
由于其在对抗多径衰落方面具有显著的效果,它适合于在无线移动通信信道下使用,因而得到广泛的研究。
3) multipath fading channel
多径衰落
1.
These parameters are difficult to obtain in multipath fading channels.
在多径衰落信道下 ,这些参数是很难获得的 。
2.
With this model,the blind multiuser detection and iterative algorithm of MC-CDMA systems based on subspace projection are studied in the multipath fading channel.
仿真结果表明,检测器具有较强的抑制多址干扰和抗多径衰落的能力,并且能快速收敛。
5) multipath fading channels
多径衰落信道
1.
The bit error rate(BER) performances of two kinds of multiple access differential chaos shift keying(MA-DCSK) systems over multipath fading channels are investigated.
研究了两种多址差分混沌键控(Multiple access differential chaos keying,MA-DCSK)通信系统分别在瑞利以及莱斯多径衰落信道下的误码率(Bit error rate,BER)性能。
2.
The demodulation performance of OFDM systems in multipath fading channels was improved with an algorithm utilizing a feedback loop based on adaptive Wiener deconvolution.
为改进正交频分复用(OFDM)系统在多径衰落信道下的解调性能,提出了基于自适应Wiener反卷积滤波反馈环路的接收算法,对多径衰落信道进行白化处理,使处理后的信道噪声接近于加性高斯噪声(AWGN)。
3.
A novel Discrete Wavelet Packet Modulation(DWPM) system based on Fractionally Spaced Equalizers(FSE) and the Maximum Likelihood(ML) algorithm is studied for multipath fading channels.
在多径衰落信道下,提出了一种基于ML的新型离散小波包调制系统。
6) multipath fading channel
多径衰落信道
1.
A fast and reliable technique with high performance for timing and frequency synchronization of multiple-input multiple-output(MIMO) orthogonal frequency division multiplexing(OFDM) system is proposed in multipath fading channel.
利用所有发送天线同时发送的移位正交chu序列对已有的定时和频偏估计算法加以改进,提出了一种在多径衰落信道下具有高精度的快速多入多出-正交频分复用(MIMO-OFDM)系统定时和频偏估计新方法。
2.
In multipath fading channel, the bit error rate (BER) performance of orthogonal frequency division multiplexing (OFDM) system using frequency domain differential detection (FDDD) is analyzed, the closed form expression of BER performance of FDDD is obtained.
在多径衰落信道条件下,分析了符号间干扰对频域差分正交频分复用系统误码率性能的影响,得到了误码率的解析表达式,分析和仿真的结果表明,频域差分的误码率性能受到符号间干扰的影响,但在不同的信道条件下,符号间干扰对系统性能的影响程度也有不同。
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