电子测试
電子測試
전자측시
ELECTRONIC TEST
2012年
7期
1-5,14
,共6页
协作通信%译码转发%互信息(MI)模型
協作通信%譯碼轉髮%互信息(MI)模型
협작통신%역마전발%호신식(MI)모형
user cooperation%decode-and-forward%mutual,information model
针对传统译码转发协作通信系统中,中继节点译码成功后转发固定长度码字导致无线资源利用率较低的问题,本文在准确预知信道状况的基础上,利用互信息模型,提出了一种自适应调节转发码字码长的译码转发算法,在满足系统误码率要求的前提下,本算法能以最短码长转发码字,从而使无线资源的利用率最大化。理论分析和仿真结果表明,在信噪比相同,且满足给定误码率条件下,本算法与传统译码转发算法相比能更加有效的利用无线资源。
針對傳統譯碼轉髮協作通信繫統中,中繼節點譯碼成功後轉髮固定長度碼字導緻無線資源利用率較低的問題,本文在準確預知信道狀況的基礎上,利用互信息模型,提齣瞭一種自適應調節轉髮碼字碼長的譯碼轉髮算法,在滿足繫統誤碼率要求的前提下,本算法能以最短碼長轉髮碼字,從而使無線資源的利用率最大化。理論分析和倣真結果錶明,在信譟比相同,且滿足給定誤碼率條件下,本算法與傳統譯碼轉髮算法相比能更加有效的利用無線資源。
침대전통역마전발협작통신계통중,중계절점역마성공후전발고정장도마자도치무선자원이용솔교저적문제,본문재준학예지신도상황적기출상,이용호신식모형,제출료일충자괄응조절전발마자마장적역마전발산법,재만족계통오마솔요구적전제하,본산법능이최단마장전발마자,종이사무선자원적이용솔최대화。이론분석화방진결과표명,재신조비상동,차만족급정오마솔조건하,본산법여전통역마전발산법상비능경가유효적이용무선자원。
A novel decode-and-forward （DF） algorithm of adjusting and transmitting the code length adaptively based on the mutual information model is proposed to deal with the problem that the utilization ratio of the wireless resources is poor in the DF user cooperation system, of which is resulted by transmitting the fixed code length after the relay node decoded successfully. The new algorithm can maximize the efficiency of wireless resources on the premise of contenting the error rate require of the system. Simulation results verify that the wireless resources are used more efficiently according to the new scheme with the same channel state and the given error rate.
