超宽带冲激无线电性能比较

介绍了超宽带冲激无线电跳时脉冲位置调制、跳时脉冲幅度调制和直接序列超宽带三种调制方式的信号模型，重点分析和比较了三种调制信号在加性高斯白噪声信道和单频干扰下的误码率特性，并对加性高斯白噪声信道中的误码率性能进行了计算机仿真。分析与仿真结果表明，在加性高斯白噪声信道中，跳时脉冲幅度调制和直接序列超宽带的误码率性能优于跳时脉冲位置调制；超宽带冲激无线电技术在信噪比条件下还具有较好的抗干扰性能。
关 键 词 超宽带无线电; 扩谱通信; 跳时; 单频干扰

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