Radio Spectrum Resources

Along with the rapidly increasing requirement and application of wireless communications , the radio spectrum resources become more and more precious .

随着无线通信需求与应用的迅猛发展，无线频谱资源日益缺少的问题凸现了出来。

In recent years , the available radio spectrum resources becoming increasingly scarce , are unable to meet the growing demand for mobile internet communications .

最几年来，可用的无线频谱资源变得越来越稀缺，无法满足人们日益增长的对移动互联通信的需求。

As wireless technology is widely applied in mobile communications , public safety , and broadcasting , modern society is increasingly dependent on the radio spectrum resources .

随着现代社会的发展，在移动通信、广播电视中无线通信技术都有比较广泛的应用，而且社会的发展对无线网络中的频谱资源需求越来越高。

In order to resolve the problem of lack of radio spectrum resources and its low usage rate , some people have proposed the idea of cognitive radio .

为了解决频谱资源缺乏和频谱利用率低下的问题，人们提出了认知无线电的思想。

Nowadays , with the rapid development of the wireless technology application and the increasing demand of the radio spectrum resources , the radio spectrum resources increasingly tense .

随着无线通信业务迅速地发展，对频谱的需求逐渐增加。目前，无线频谱资源日渐紧张。

First , the radio spectrum resources for the mobile communication system are limited , the issue of how to improve the spectral efficiency has been placed in front of us .

其一，移动通信系统可用的频谱资源是有限的，如何充分提高频谱资源的使用效率是个亟待解决的问题。

Because of the addition of these new types of services , the data amount of wireless communication network is increasing rapidly , which make the scarce radio spectrum resources tenser .

各种业务种类的增加，使得无线网络中的通信数据量急剧增大，原本就稀缺的无线频谱资源变的更加紧张。

With the sustained growth of wireless communication services , the confliction of the limited radio spectrum resources and the increased radio spectrum demand hampers the development of wireless communication .

随着无线通信业务需求的持续增长，有限的频谱资源与日益增长的频谱需求之间的矛盾已经成为制约无线通信发展的瓶颈。

With the rapid development of modern wireless communications business , the contradiction between the limited radio spectrum resources and the requirements for higher speeds and better service quality is growing lager .

随着现代无线通信业务的快速发展，人们对更高速率和更好质量服务的要求和日益紧张的无线频谱资源之间的矛盾越来越大。

In modern information society , a variety of emerging wireless communication technology is widely used . As a result , radio spectrum resources shortage becomes one of the main factors which constraints further development of wireless communications and is causing more concern from people .

在各种新兴无线通信技术被广泛应用的现代信息社会，无线频谱资源的匮乏问题作为制约无线通信领域进一步发展的主要因素之一，正逐渐引起人们的关注。

Rational usage of limited radio spectrum resources is the focus of attention in order to improve spectrum utilization . System sharing can effectively improve the frequency efficiency , but in order to ensure the operation , it is necessary for two systems to sharing study .

系统共用可以有效的提高无线电频谱的使用效率，但是为了保证共存的系统都能正常工作，首要的研究工作是对系统间进行干扰分析研究。

As wireless communications kept developing rapidly for the recent years , demand on radio spectrum resources has dramatically increased , which forced the government to attach as much importance to radio spectrum resources as that to the natural ones such as land , mine and forest .

近些年来，随着无线通信的飞速发展，无线频谱资源的需求量正在急剧增加，使得国家已将其与土地、矿山、森林等列为同等重要的资源。

Multiple Input Multiple Output ( MIMO ) technology , which use antenna arrays rather than additional bandwidth for multiplying data rates , can overcome the problem of short radio spectrum resources well , and has been one of key issues in the next-generation wireless communication systems .

MIMO技术利用增加天线对而不是额外的带宽来成倍提高数据速率，能很好解决无线频谱资源短缺的问题，成为下一代无线通信系统的关键技术。

With the current rapid development of communication technology , radio frequency spectrum resources have begun to dry up . This phenomenon has limiting the development of wireless communication technology .

随着日新月异的通信技术发展，无线电频谱资源已经开始枯竭，限制了无线通信技术的发展。

However , the radio frequency spectrum resources are extremely limited , how to further improve the the spectral efficiency under limited frequency spectrum resources is an urgent problem to be solved .

然而，无线电频谱资源是很有限的，如何在有限的资源下进一步提高数据流量成为一个亟待解决的问题。

Radio Spectrum is non-renewable natural resources , and its total size is limited , with the rapid development of wireless communication networks , spectrum shortage has become increasingly evident .

频谱是一种不可再生的自然资源，其总量有限，随着无线通信网络的高速发展，频谱的短缺现象已经越来越明显。

Chinese Property Law and the Radio Management Ordinance clearlystipulates : " The radio spectrum resources are owned by the state " .

我国《物权法》和《无线电管理条例》明确规定：无线电频谱资源属于国家所有，产品进入市场前，必须经过射频性能检测。

With the rapid development of radio technology and a large number of radio stations ' operation , the radio spectrum resources become increasingly strained , and the radio spectrum pollution incidents have occurred , which seriously endangered the normal order of the air waves .

随着无线电技术的快速发展和越来越多的无线电台站的建设运行，使无线电频谱资源日趋紧张，无线电频谱污染事件时有发生，严重危害了正常的空中电波秩序。

The cognitive radio , defined as an intelligent system that is aware of surrounding environment and learns from the environment and adjusts its parameters to share radio spectrum resources with authorization cognitive users , then improving the utilization of spectrum resources .

认知无线电技术可以通过对周围环境的主动观察和学习，来对频段占用情况进行判决，并通过调整自身参数与授权认知用户共享无线频谱资源，从而大幅提高频谱资源利用率。

Cognitive radio is now emerging as a promising paradigm to address the contradiction between the rapid development of wireless communications and the scarcity of available radio spectrum resources , which has attracted extensive attention from academic researchers and become a hot research topic in the wireless communication field .

认知无线电可望解决无线通信快速发展与可用频谱资源日益紧缺的矛盾，因而备受关注，已成为当前无线通信领域的研究热点。

However , the existing radio spectrum resource management and allocation policy makes the current radio spectrum efficiency at a very low level : most allocated radio spectrum has not been fully utilized , and some hot radio spectrum resources are overloaded .

但是，现有的频谱管理和分配政策使得目前频谱利用率十分低下：大部分已分配频谱并没有被充分使用，而一些热点频谱却超负荷运行。