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机译:星展工作坊

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摘要

Broadcasters must identify the kind of network needed, that is either an SFN (Single Frequency Network) or MFN (Multiple Frequency Network). Next would be to specify the type of service needed, which can be fixed, mobile or portable. The network has to be designed for either local or nationwide coverage. Hence the transmitter distances must be ascertained and the guard interval specified, after taking into account the different configuration modes for the OFDM carriers ranging from 1k, 2k, 4k, 8k, 16k and 32k mode. The resolution of the programme should be determined as to whether it is to be SD or HD. This in turn affects the choice of technical parameters including the code rate, modulation, and pilot pattern. Thus, it can be deduced that starting with the right basics is an essential part of the initial plan. Selection and availability of broadcasting sites have to be carried out. Network optimisation can be obtained by conducting project-specific antenna design. Taking into consideration is the use of existing infrastructure from analogue TV network and its suitability for DTT.
机译:广播公司必须确定所需的网络类型,即SFN(单频网络)或MFN(多频网络)。接下来是指定所需的服务类型,可以是固定的,移动的或便携式的。该网络必须设计为覆盖本地或全国范围。因此,在考虑到OFDM载波的不同配置模式范围为1k,2k,4k,8k,16k和32k之后,必须确定发射机距离并指定保护间隔。程序的分辨率应确定是SD还是HD。反过来,这会影响技术参数的选择,包括编码率,调制和导频模式。因此,可以推论,从正确的基础开始是初始计划的重要组成部分。广播站点的选择和可用性必须进行。通过进行特定项目的天线设计可以获得网络优化。考虑使用模拟电视网络中现有的基础设施及其对DTT的适用性。

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