QAM at a fixed point-to-point digital microwave systs in the wider application, it has a very high frequency spectrum utilization.
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。
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.
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。
Tremendous growth in demand of the users and limitation of our frequency resource needs more efficient transmission techniques to realize high efficiency of spectrum utilization.
移动用户飞速增长的业务需求和日益紧张的频率资源要求更有效的传输技术来实现频谱资源的高效利用。
The next generation mobile communication 4g called will support very high data transmission rate. It's necessary to introduce technology with high frequency utilization in limited frequency spectrum.
未来的新一代移动通信系统4g需要提供极高的数据速率，在有限的频谱下提供尽可能高的传输速率，这就需要采用高频谱利用率技术。
The utilization rate of licensed spectrum is very low in the time domain, frequency domain and space domain, while the unlicensed band is overcrowded seriously.
大部分授权频段在时域、频域和空间域的利用率很低，而公共频段出现了严重的频谱拥挤。
Compared with traditional mobile telecommunication, special wireless data network has good qualities in constructing cost, frequency-spectrum utilization, reliability and so on.
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。
This paper describes a new viewpoint: of evaluating the utilization rate of the spread spectrum system frequency band.
本文提出了评价扩频系统频带利用率的新观点。
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.
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.
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。
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