现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
22期
118-121
,共4页
自适应遗传算法%低噪声放大器%匹配电路%射频接收系统
自適應遺傳算法%低譟聲放大器%匹配電路%射頻接收繫統
자괄응유전산법%저조성방대기%필배전로%사빈접수계통
self-adaptive genetic algorithm%low-noise amplifier%matching circuit%RF receiving system
低噪声放大器是射频接收系统的关键组成部分,决定了系统的噪声特性,直接影响接收灵敏度.提出一种利用自适应遗传算法设计低噪声放大器匹配电路的思路,自动优化交叉概率和变异概率,避免了易早熟的缺点.采用这一算法进行了放大器设计实验,放大器具有较低的噪声系数、较高的放大增益,以及较好的带外抑制效果.实验结果表明实测和软件仿真性能吻合较好,证明了自适应遗传算法设计的可靠性.
低譟聲放大器是射頻接收繫統的關鍵組成部分,決定瞭繫統的譟聲特性,直接影響接收靈敏度.提齣一種利用自適應遺傳算法設計低譟聲放大器匹配電路的思路,自動優化交扠概率和變異概率,避免瞭易早熟的缺點.採用這一算法進行瞭放大器設計實驗,放大器具有較低的譟聲繫數、較高的放大增益,以及較好的帶外抑製效果.實驗結果錶明實測和軟件倣真性能吻閤較好,證明瞭自適應遺傳算法設計的可靠性.
저조성방대기시사빈접수계통적관건조성부분,결정료계통적조성특성,직접영향접수령민도.제출일충이용자괄응유전산법설계저조성방대기필배전로적사로,자동우화교차개솔화변이개솔,피면료역조숙적결점.채용저일산법진행료방대기설계실험,방대기구유교저적조성계수、교고적방대증익,이급교호적대외억제효과.실험결과표명실측화연건방진성능문합교호,증명료자괄응유전산법설계적가고성.
The low-noise amplifier is the key component of the RF receiving system,which determines the system noise characteristics and affects the receiving sensitivity directly. A thought of applying self-adaptive genetic algorithm to design the matching circuit of the low-noise amplifier circuit is proposed,in which the crossover and mutation probability are optimized au-tomatically to avoid the defect of premature convergence. The amplifier was designed and tested with the algorithm,which has low-noise factor,high amplifying gain and good out-of-band rejection effect. The experimental results show that the actual mea-sured result is identical with that of the software simulation greatly,and proves that the self-adaptive genetic algorithm is reliable.
