在珠三角地区对超高频(Ultra High Frequency,UHF)频段开展了近两个月的监测,给认知无线电技术在广东省的应用提供了现实依据.结果表明:频段利用率普遍较低,同一频段在不同地区、不同时段的利用情况存在一定的差异.对广播电视频道占用...在珠三角地区对超高频(Ultra High Frequency,UHF)频段开展了近两个月的监测,给认知无线电技术在广东省的应用提供了现实依据.结果表明:频段利用率普遍较低,同一频段在不同地区、不同时段的利用情况存在一定的差异.对广播电视频道占用情况的建模体现了频道开放时间的规律性;根据各频率点的利用率情况将频率划分为五个占用程度,可得出可供认知无线电用户接入的连续空闲带宽的概率分布.展开更多
In Bangladesh, more than a dozen of private TV channels are operating and about 10 new channels are waiting with green signal for transmission. Bangladesh Television （BTV）, the only government owned and administered...In Bangladesh, more than a dozen of private TV channels are operating and about 10 new channels are waiting with green signal for transmission. Bangladesh Television （BTV）, the only government owned and administered, and known as structurally a biased institution serves the audience the public service information most. At the same time it serves purposes of incumbent government. Public information （PI） broadcast means broadcasting towards public welfare which may bring about change in the betterment of life and work of people. Its main focus would be on information, education, and motivation values rather than entertainment. In case of information, dissemination, and documentation, all private TV channels in Bangladesh serve more entertainment and less public service information, whereas, BTV＇s focus is evident on more PI. The owners and operators of private channels think first of their business profit as well as pressure from government and political parties. During formulating planning and strategies or building program content, they become cautious as they fear that the government become angry and shut down the channel.展开更多
文摘在珠三角地区对超高频(Ultra High Frequency,UHF)频段开展了近两个月的监测,给认知无线电技术在广东省的应用提供了现实依据.结果表明:频段利用率普遍较低,同一频段在不同地区、不同时段的利用情况存在一定的差异.对广播电视频道占用情况的建模体现了频道开放时间的规律性;根据各频率点的利用率情况将频率划分为五个占用程度,可得出可供认知无线电用户接入的连续空闲带宽的概率分布.
文摘In Bangladesh, more than a dozen of private TV channels are operating and about 10 new channels are waiting with green signal for transmission. Bangladesh Television （BTV）, the only government owned and administered, and known as structurally a biased institution serves the audience the public service information most. At the same time it serves purposes of incumbent government. Public information （PI） broadcast means broadcasting towards public welfare which may bring about change in the betterment of life and work of people. Its main focus would be on information, education, and motivation values rather than entertainment. In case of information, dissemination, and documentation, all private TV channels in Bangladesh serve more entertainment and less public service information, whereas, BTV＇s focus is evident on more PI. The owners and operators of private channels think first of their business profit as well as pressure from government and political parties. During formulating planning and strategies or building program content, they become cautious as they fear that the government become angry and shut down the channel.
