%0 Journal Article
%T Study of LDPC error floor<br>LDPC码的错误平层研究*
%A HU Jin-tao
%A WANG Yong-sheng
%A XU Jia-dong
%A WANG Ding
%A <br>胡锦涛
%A 王永生
%A 许家栋
%A 王顶
%J 计算机应用研究
%D 2011
%I 
%X In order to study LDPC codes error floor phenomenon, this paper proposed a method using importance sampling method. In the AWGN channel, when the bit error rate was very low, compared to the traditional Monte Carlo method, the proposed method achieved higher simulation gain, with the same simulation quality. The method could also simulate the area which could not be simulated using the traditional Monte Carlo method. The simulation results show that, for a code length equal to 2 000, code rate equal to 1 / 2 LDPC code word, when the bit error rate of 10-20, the proposed method achieves more than 1014 simulation gain.
%K LDPC
%K error floor
%K trapping sets
%K Monte-Carlo simulation
%K importance sampling simulation<br>低密度奇偶校验码，
%K 错误平层，诱捕集，蒙特卡洛仿真，重要信息抽样仿真
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=9A2BF25784CA6C5EE29E32A79CC9580A&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=38B194292C032A66&sid=33C2C2DAF31F219B&eid=1A775ABEB80E436B&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=13