摘要
采用遗传算法(GA)进行了一种新颖的超宽带(UWB)脉冲波形的设计。从多带Chirp信号出发,将波形设计问题转化成有约束条件的逼近问题求解,然后通过遗传算法解决逼近问题。得到的波形不仅满足联邦通讯委员会(FCC)的频谱模板,而且具有88%的频谱利用率。仿真结果验证了采用遗传算法的波形设计具有低时间复杂度;提出的UWB脉冲波形具有较高的频谱利用率,优于其他的UWB脉冲例如B样条脉冲。
A novel ultra-wideband （UWB） pulse waveform design using genetic algorithm is proposed. At first, we use the muhiband chirp signals and convert the waveform design problem into a constrained approximation problem. Then, we use GA to solve the approximation problem. The waveform obtained in this way not only meets the FCC spectral mask, but also has a spectrum utilization rate of 88%. Simulation results verify the waveform design using GA has low time complexity; and the proposed pulse waveform has high spectral efficiency, superior to other UWB pulse such as B-spline impulse.
出处
《无线电工程》
2012年第1期14-16,共3页
Radio Engineering
基金
国家自然科学基金资助项目(60902046
60972079)
国家科技重大专项资助项目(2009ZX03006-006
2009ZX03006-009)
