Spectrum Occupancy Measurements and Analysis in 2.4 GHz WLAN
Spectrum Occupancy Measurements and Analysis in 2.4 GHz WLAN
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DOI：
10.3390/electronics8091011
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发表时间：
2019-09-01
期刊：
影响因子：
2.9
通讯作者：
Salous, Sana
中科院分区：
文献类型：
--
作者：
Cheema, Adnan Ahmad;Salous, Sana
提出了2.4 GHz无线局域网信号的高时间分辨率频谱占用测量和分析方法。定制的宽带传感引擎记录信号的接收功率，并给出其性能，以选择定义信道状态（忙/空闲）所需的决策阈值。提出了两组测量，其中数据收集使用全向和定向天线在室内环境。使用更广泛的分布来分析2.4 GHz WLAN中空闲时间窗的统计数据，与广泛使用的相位类型或高斯混合分布相比，这些分布需要更少的参数来计算，并且更易于实现。对于全向天线，发现对数正态分布和伽马分布可以用来模拟不同网络流量负载下的空闲时间窗的行为。此外，测量结果表明，低时间分辨率和低到达角影响了空闲时间窗的统计。
High time resolution spectrum occupancy measurements and analysis are presented for 2.4 GHz WLAN signals. A custom-designed wideband sensing engine records the received power of signals, and its performance is presented to select the decision threshold required to define the channel state (busy/idle). Two sets of measurements are presented where data were collected using an omni-directional and directional antenna in an indoor environment. Statistics of the idle time windows in the 2.4 GHz WLAN are analyzed using a wider set of distributions, which require fewer parameters to compute and are more practical for implementation compared to the widely-used phase type or Gaussian mixture distributions. For the omni-directional antenna, it was found that the lognormal and gamma distributions can be used to model the behavior of the idle time windows under different network traffic loads. In addition, the measurements show that the low time resolution and angle of arrival affect the statistics of the idle time windows.