期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Fermat猜想的部分证明
1
作者 杨建 《纯粹数学与应用数学》 CSCD 1991年第1期68-73,共6页
一.引言 Fermat的著名猜想(x^n+y^n=z^n,n≥3时没有正整数解)引起了三百多年来许多数学家的浓厚兴趣。1770年,欧拉证明了n=3的情形;1823年,勒让德证明了n=5的情形;1839年,拉梅证明了n=7的情形;之后,尽管许多数学家为此进行了不懈的努力。
关键词 Fermat猜想 正整数 形式解表达式
下载PDF
Generalised Closed-Form Symbol Error Rate Analysis for Orthogonal Space-Time Block Coded OFDM System
2
作者 王旭东 吴楠 高春丽 《China Communications》 SCIE CSCD 2013年第9期155-164,共10页
In this paper,the Symbol Error Rate(SER)performance for Orthogonal Space-Time Block Coded(OSTBC)Orthogonal Frequency Division Multiplexing(OFDM)systems over Nakagami-m fading channels is analysed.A novel closed-form S... In this paper,the Symbol Error Rate(SER)performance for Orthogonal Space-Time Block Coded(OSTBC)Orthogonal Frequency Division Multiplexing(OFDM)systems over Nakagami-m fading channels is analysed.A novel closed-form SER expression is proposed,which incorporates the Gauss hypergeometric function and Appell hypergeometric function into the conventional Probability Density Function(PDF)approach.The proposed exact closed-form SER expression is a generalised solution since it perfectly captures OSTBCOFDM systems’performances when having different antenna configurations that employ various modulation schemes and which experience various fading conditions.Finally,Monte Carlo simulation results are provided to demonstrate the exact match between the simulation results and the proposed analytical expressions. 展开更多
关键词 OSTBC-OFDM closed-form SER Nakagami-m fading channel
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部