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。
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