超寬帶沖激無線電性能比較

介紹了超寬帶沖激無線電跳時脈沖位置調(diào)制、跳時脈沖幅度調(diào)制和直接序列超寬帶三種調(diào)制方式的信號模型，重點分析和比較了三種調(diào)制信號在加性高斯白噪聲信道和單頻干擾下的誤碼率特性，并對加性高斯白噪聲信道中的誤碼率性能進行了計算機仿真。分析與仿真結(jié)果表明，在加性高斯白噪聲信道中，跳時脈沖幅度調(diào)制和直接序列超寬帶的誤碼率性能優(yōu)于跳時脈沖位置調(diào)制；超寬帶沖激無線電技術(shù)在信噪比條件下還具有較好的抗干擾性能。
關(guān) 鍵 詞 超寬帶無線電; 擴譜通信; 跳時; 單頻干擾

Abstract This paper introduces time-hopping pulse-position-modulation, binary time-hopping pulse-amplitude-modulation and direct sequence ultra wideband first. Then we analyze the bit error rate performances of the three Ultra Wideband radio models in additive white Gaussian noise and in the presence of single-tone jamming and the results obtained are compared by theoretic analysis and computer simulation. The simulation results show that the Ultra Wideband radio is of good performance in low SNR indeed, and the bit error rate performances of binary time-hopping pulse-amplitude-modulation and direct sequence ultra wideband schemes are better than that of time-hopping pulse-position-modulation scheme.
Key words ultra wideband radio; spread-spectrum communications; time-hopping; single-tone jamming