This system can utilize the transmission bandwidth more efficiently and achieve frequency diversity.
这种系统能更有效地利用传输带宽，实现频率分集。
Screw machine product, while species diversity, but different brands of the difference between technology, are using smaller decide frequency compression technology, homogeneity serious.
螺杆机产品虽然品种多样，但是不同品牌之间的技术差别较小，都是采用定频压缩技术，同质化严重。
Although the additional frequency diversity gain can be attained, by using efficient detection techniques, the performance of OFDM-CDM system is better than that of conventional OFDM.
CDM系统虽然获得了频率分集增益，但是，它必须通过有效的检测技术才能使其性能较之OFDM系统有所改善。
The tapped delay model of the multi-path frequency selective fading channels as well as the diversity receiver technique is introduced, and the principles of RAKE receiver are described.
本文首先讨论了移动通信信道的各种参数对信道估计的影响，介绍了频率选择性信道的抽头延迟线模型和分集接收技术，在此基础上阐述了RAKE接收机的原理。
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。
Therefore, system acquisition performance can be improved if diversity receiver is adopted for the frequency-selective fading channel.
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。
We derive the condition of the space-frequency codes to achieve maximum achievable diversity gain.
其次，我们对适合频率选择性衰落信道的空频码提出了一些独创性的想法。
The new coded strategy can achieve full space-time-frequency diversity over frequency selective fading channel.
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。
Simulation results demonstrate the validity of the novel labeled-delay transmit diversity scheme and the performance of the blind estimation of frequency-selective channels.
仿真结果表明了上述标签延迟发射分集方法的有效性及其信道盲估计方法的性能。
Extensive simulations show that combining three diversity branches with proper frequency shifts reduces BER by an order when the normalized Doppler spread is larger than 0.3.
大量的仿真结果表明，三个分集结合适当的频率变化，降低了误码率的命令时，归一化多普勒扩展是大于0.3。
A novel frequency domain Doppler diversity technique for OFDM systems is proposed.
提出了一种新的频域多普勒分集技术的OFDM系统。
The method and apparatus comprises transmitting a packet and a redundant packet according to spatial, time and frequency diversity to enhance the redundancy error processing.
所述方法和设备包括根据空间，时间和频率分集来传输分组和冗余分组，以增强冗余错误处理。
A novel design of OFDM-based space-frequency codes is proposed such that the maximum achievable diversity gain is available.
提出了一种基于OFDM达到最大可达分集增益的空频码设计方案。
The differential coding is performed in the time domain, while the space-frequency coding is processed in the frequency domain to achieve the diversity ga.
该方法在时域进行差分编码，而在频域进行空频编码以获得分集增益。
It is characteristic of diversity, activity, integrity and the use of the frequency characteristics.
它具有多元性、动态性、完整性和利用频繁性等特点。
Equipment for implementing intelligent antenna includes: array diversity antenna, radio frequency channels, beam forming unit, baseband processing MODEM and beam controller.
一种基于数字波束的智能天线实现装置，包括：阵列分集天线、射频通道、波束形成单元、基带处理MODEM和波束控制器。
Equipment for implementing intelligent antenna includes: array diversity antenna, radio frequency channels, beam forming unit, baseband processing MODEM and beam controller.
一种基于数字波束的智能天线实现装置，包括：阵列分集天线、射频通道、波束形成单元、基带处理MODEM和波束控制器。
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