关键词: 兵器科学与技术, 脉冲超宽带, 地雷场环境, 近地面传播, 实验测试, 信道分析

Abstract: In order to research the propagation properties of impulse radio ultra wideband（IR-UWB）signals in the minefield near-ground environment and provide a technology support for the future development of landmines, the IR-UWB signals were test experimentally in three typical propagation environments. The features of received signals are researched based on the measured data. An analytic method with energy ratio detection and multipath component criterion is proposed. The channel impulse responses (CIRs) and main parameters are statistically calculated and analyzed. The calculated result shows that the path loss coefficient in near-ground environment is smaller than that in free space since the signal reflects from the ground and surrounding obstacles. With the calculation, the path loss coefficients range from 1.50 to 1.85 for the antenna heights of 0.3 m and 0.5 m. According to the CLEAN algorithm with self-adaptive threshold, the error ratios of the original signals and recovered signals from CIRs are not more than 30%. The result shows that the calculated channel parameters correspond with the characteristics of the propagation environment. The feasibility of the proposed method and the accuracy of the channel analysis results were verified.

Key words: ordnance science and technology, impulse radio-ultra wideband, minefield environment, near-ground propagation, experimental test, channel analysis