期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
基于正交互补序列的瞬时极化测量编码波形设计 被引量:8
1
作者 刘勇 李永祯 +1 位作者 王雪松 李群 《信号处理》 CSCD 北大核心 2009年第9期1353-1359,共7页
以二相编码波形为例,建立了瞬时极化雷达的极化测量信号模型;为提高波形的峰值旁瓣电平(PSL)和隔离度(I),设计出用于瞬时极化测量的正交互补二相编码波形,分析了其匹配接收方案;以26位正交互补序列为例,讨论了该编码波形的自模糊函数、... 以二相编码波形为例,建立了瞬时极化雷达的极化测量信号模型;为提高波形的峰值旁瓣电平(PSL)和隔离度(I),设计出用于瞬时极化测量的正交互补二相编码波形,分析了其匹配接收方案;以26位正交互补序列为例,讨论了该编码波形的自模糊函数、互模糊函数特性;最后,结合具体雷达参数,分析了其极化测量性能:对于静止目标或多普勒频移精确补偿后,该编码波形具有特有优势,既能消除多目标间的相互干扰,又能消除散射矩阵元素之间的串扰影响,准确进行散射矩阵测量,当多普勒频移不能精确补偿时,该编码波形极化测量性能将变差,例如,在本文测量参数下,当多普勒频移为6KHz时,PSL、1分别下降至28.5dB、22.5dB。本文结果对研究相位编码波形在瞬时极化测量中的应用前景及工程实现等问题具有参考价值。 展开更多
关键词 瞬时极化测量 正交互补序列 自模糊函数 模糊函数 测量性能
在线阅读 下载PDF
Fuzzy adaptive genetic algorithm based on auto-regulating fuzzy rules 被引量:6
2
作者 喻寿益 邝溯琼 《Journal of Central South University》 SCIE EI CAS 2010年第1期123-128,共6页
There are defects such as the low convergence rate and premature phenomenon on the performance of simple genetic algorithms (SGA) as the values of crossover probability (Pc) and mutation probability (Pro) are fi... There are defects such as the low convergence rate and premature phenomenon on the performance of simple genetic algorithms (SGA) as the values of crossover probability (Pc) and mutation probability (Pro) are fixed. To solve the problems, the fuzzy control method and the genetic algorithms were systematically integrated to create a kind of improved fuzzy adaptive genetic algorithm (FAGA) based on the auto-regulating fuzzy rules (ARFR-FAGA). By using the fuzzy control method, the values of Pc and Pm were adjusted according to the evolutional process, and the fuzzy rules were optimized by another genetic algorithm. Experimental results in solving the function optimization problems demonstrate that the convergence rate and solution quality of ARFR-FAGA exceed those of SGA, AGA and fuzzy adaptive genetic algorithm based on expertise (EFAGA) obviously in the global search. 展开更多
关键词 adaptive genetic algorithm fuzzy rules auto-regulating crossover probability adjustment
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部