By analyzing the fluctuation characteristics of the signal to noise ratio (SNR) of smart phones, a quality control method combining the cut-off SNR and the proportion of excluded data for data screening is proposed.By setting different data screening schemes, data collected in static and dynamic observations were compared and analyzed through the Xiaomi Mi 8 and Huawei Mate 20 smartphones.The experimental results show that the SNR fluctuation cycle and range of different satellites on the smartphone side are different, there are independence, and the correlation between the high angle and the SNR is weaker than the measured receiver.Therefore, filtering data based on the cutoff signal to noise ratio is more reasonable.The proportion of data excluding data to settle the SNR is about 5％-10％, which increases the best positioning accuracy of smartphones.Currently, the deadline SNR ratio is about 25 dB-Hz.Compared with the traditional setting of the 15° satellite cut-off elevation, the E,N,U accuracy of the method mentioned increased by 25％, 10％, and 20％ in the static, and the dynamics increased by 30％, 20％, and 5％.
关键词
智能手机/信噪比/高度角/相关性分析/定位精度
Key words
smartphone/signal to noise ratio/elevation/correlation analysis/positioning accuracy
维普
万方数据