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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Call performance in a frequency reuse digital portable radio system
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Call performance in a frequency reuse digital portable radio system

机译:频率复用数字便携式无线电系统中的通话性能

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摘要

A discrete-event stochastic simulation of many concurrent calls was used to generate signal-to-interference ratio (S/I) time histories and statistics on a time-division multiple-access (TDMA) uplink. The simulation integrates portable radio multiple access, uplink/downlink signal modeling, and the traffic process. Calls were held to completion, enabling observation of the effects of cochannel interference on time-dependent S/I statistics. It was found that the improvement obtained from measurement-based time-slot assignment in uplink S/I at access partially erodes over the life of a call, if it retains the time-slot assigned at the start. The amount and speed of erosion of S/I at the first percentile suggests that good transmission quality can be maintained for stationary users, with low overhead in the fixed radio network.
机译:使用多个并发呼叫的离散事件随机仿真来生成时分多址(TDMA)上行链路上的信号干扰比(S / I)时间历史和统计信息。该仿真集成了便携式无线电多路访问,上行链路/下行链路信号建模以及业务流程。通话已完成,可以观察到同频道干扰对与时间有关的S / I统计数据的影响。已经发现,如果在接入的上行链路S / I中基于测量的时隙分配而获得的改进保留了在开始时分配的时隙,则该改进在整个呼叫周期内都会受到侵蚀。在第一个百分位数处,S / I的侵蚀数量和速度表明,固定用户可以保持良好的传输质量,而固定无线网络的开销却很小。

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