阵列天线是提高频谱利用率一种可实现的方法。
Adaptive antenna array is an approach that shows real promise for increasing spectrum efficiency.
利用GMSK调制技术提高了频谱利用率和通信质量。
GMSK modulation technology is used to improve spectrum utilization and communication quality.
认知无线电技术因其提高频谱利用率的能力而广受关注。
Cognitive radio is interested because this technique can increase spectrum efficiency.
随后讨论了该方案的频谱利用率和成对错误概率(pep)。
The spectral efficiency and pairwise error probability (PEP) is also considered.
自适应调制能提高系统的频谱利用率和改善系统的误码率性能。
Adaptive modulation can improve the system performance with high spectral efficiency.
日益增长的无线业务需求要求提高衰落信道上无线通信的频谱利用率。
The growing demand for wireless services has created the need for improving the spectral efficiency of wireless communications over fading channels.
近年来，由于该系统具备较高传输容量和频谱利用率，而受到了广泛关注。
Because of its high capacity and large spectral efficiency, V-BLAST system became popular in recent years.
在保证良好通信质量的情况下，如何提高频谱利用率，已经成为一个难题。
Therefore how to improve spectrum utilization at the same time ensure the quality of good communication, has become a difficult problem.
仿真结果表明，该算法在有效频谱利用率和平均满意度上都优于现有算法。
Simulation results show that the proposed algorithm outperforms the existing algorithms in effective spectrum utilization efficiency and in average satisfaction degree.
自适应编码调制(amc)技术可以有效地提高无线数据传输的频谱利用率。
Adaptive modulation and coding (AMC) can effectively improve the spectral efficiency for wireless data transmissions.
认知无线电(CR)被认为是解决无线频谱利用率低的问题的最佳解决方案。
Cognitive radio (CR) is considered to be the best solution to solve the low utilization problem of the wireless spectrum.
其中多进制调制，不仅能够提高频谱利用率，并且能保证较小的频谱占用率。
Multimode modulation is a good method to increase the frequency efficiency and to maintain smaller frequency occupancy rate.
作为MIMO系统的一种实现方案，VBLAST可以获得很高的频谱利用率。
AS a scheme of MIMO, VBLAST can provide extremely high spectrum efficiency.
但该方法占用专门的子载波或时隙，降低了系统的频谱利用率和信息传输速率。
But this method occupies the special sub-carriers or time slots and then reduces the system spectrum efficiency and data transmission rate.
QAM在固定的点对点数字微波系统中应用较广泛，它具有很高的频谱利用率。
QAM at a fixed point-to-point digital microwave systs in the wider application, it has a very high frequency spectrum utilization.
在有限的无线频谱资源条件下，只有极大地提高频谱利用率才能使系统容量更高。
With limited radio frequency resources, it can only be satisfied by tremendously enhancing the frequency utilization efficiency.
下一代移动通信系统是一个高频谱利用率、高传输速率，并可提供多种服务的无线网络。
The next generation mobile communication systems will have higher spectrum efficiency, higher transmission rate, and provide multimedia services to the users.
分析了在信道存在加性白噪声和多址干扰的条件下，频带细化对提高频谱利用率的作用。
The effect of bandwidth division on the improvement of the frequency spectrum utilization is analyzed under the condition of the multi-access interference and Gaussian white noise.
另一方面，功率控制、数据速度分配也是改善无线多媒体通信频谱利用率的两种基本技术。
On the other hand, power control and data rate allocation are two fundamental techniques for improving the spectral efficiency of wireless multimedia communications.
分析表明，这些协作检测算法能够改善系统的检测性能、减低干扰冲突、提高频谱利用率。
It is proved that significant cooperative gain can be achieved by the proposed models in reducing interference and improving spectrum usage.
它具有结构简单，频谱利用率高的优点，因此成为高速大容量光纤通信系统中的研究热点。
It has high frequency efficiency and its implement is simple. Therefore, it has become the topic in high-speed mass optical fiber communication system.
与传统移动通信系统的数据传输相比，无线专网具有低成本、高频谱利用率、高可靠性等优点。
Compared with traditional mobile telecommunication, special wireless data network has good qualities in constructing cost, frequency-spectrum utilization, reliability and so on.
该方案允许未授权用户自适应地选取可用带宽，实现了动态频谱接入，有效地提高了频谱利用率。
In our scheme, unlicensed users are allowed to adaptively select available spectrum, adopt dynamic spectrum access technology, improving spectrum utilization effectively.
与传统的模拟集群移动通信系统相比，TETRA具有更高的频谱利用率，提供更广泛的业务服务。
Compared with the traditional analog trunked ra-dio, TETRA is more spectrum efficient and can provide extensive services.
而且OFDM技术具有抗多径衰落，频谱利用率高等优点，特别适合于无线环境下的高速数据传输。
OFDM technology has many advantages, such as defending the multipath fading and high bandwidth efficiency, which are suitable for the high-rate data transmission in wireless enviroment.
认知无线电的出现不但改善了某些业务因没有频段不能通信的尴尬局面，而且也提高了频谱利用率。
So the cognitive radio not only changes the embarrassing situation that there are not frequency channels could be used but also increases the utilization of spectrum.
仿真结果表明，在慢衰落无线信道图像传输中，系统能获得满意的图像传输质量和很高的频谱利用率。
Simulation results show that the system can get satisfactory image communication performance in the very high spectral efficiency situation over the flat fading channel.
MIMO技术是无线移动通信领域智能天线技术的重大突破，能够成倍提高系统的容量和频谱利用率。
MIMO technology is the significant breakouts in smart antenna technology of wireless communication field, it can significantly improve system capacity and using rate of frequency.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
因而，研究适合于高速数据传输的跳频通信特点且具有高效频谱利用率的调制技术具有重要的实际意义。
Therefore, it has a practical significance to develop some fit methods of modulation with high spectrum efficiency for shortwave FH communication system.
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