It spurs us to develop highly efficient coding, modulation and signal processing techniques to improve the wireless frequency spectrum efficiency.
这种挑战使得人们努力开发高效的编码、调制以及信号处理技术来提高无线频率的效率。
Many of the TV frequency bands have been vacated by TV's move to digital, so, in a country hungry for wireless resources, it was proposed that this spectrum get redirected to mobile access use.
当电视信号变为数字信号后，许多电视的频率带宽都被闲置下来。因此，在一个渴望无线资源的国家，这些频带被引向移动接入应用可谓众望所归。
Expanding service to some areas of the country will require wireless transmission. But there is a limited amount of radio frequency spectrum available.
在国家其他一些地区扩大网络服务需要无线传输。但是他们只有一个限制数量的无线电频谱。
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。
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。
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