无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2015年
7期
10-13,94
,共5页
干扰对齐%多输入多输出%有限反馈%功率控制
榦擾對齊%多輸入多輸齣%有限反饋%功率控製
간우대제%다수입다수출%유한반궤%공솔공제
interference alignment%multiple-input multiple-output%limit feedback%power control
干扰对齐技术作为协作通信技术的实现形式之一,可以看作一种分布式多输入多输出( MIMO)技术,有效提高了无线通信系统的容量和可靠性。但是目前该技术的实现方案均是基于固定功率分配的。针对基于垂直分层空时码( V-BLAST)实现空间复用的MIMO系统,提出了一种基于条件数的自适应功率分配方案,即在给定有限反馈比特的前提下,实现最优的功率控制。该方案只需引入少量反馈信息,在发送端进行功率分配,对于给定的条件数区间,选择相应的发送功率。仿真结果表明,该功率分配方案有效地降低了误帧率,提高了系统容量。
榦擾對齊技術作為協作通信技術的實現形式之一,可以看作一種分佈式多輸入多輸齣( MIMO)技術,有效提高瞭無線通信繫統的容量和可靠性。但是目前該技術的實現方案均是基于固定功率分配的。針對基于垂直分層空時碼( V-BLAST)實現空間複用的MIMO繫統,提齣瞭一種基于條件數的自適應功率分配方案,即在給定有限反饋比特的前提下,實現最優的功率控製。該方案隻需引入少量反饋信息,在髮送耑進行功率分配,對于給定的條件數區間,選擇相應的髮送功率。倣真結果錶明,該功率分配方案有效地降低瞭誤幀率,提高瞭繫統容量。
간우대제기술작위협작통신기술적실현형식지일,가이간작일충분포식다수입다수출( MIMO)기술,유효제고료무선통신계통적용량화가고성。단시목전해기술적실현방안균시기우고정공솔분배적。침대기우수직분층공시마( V-BLAST)실현공간복용적MIMO계통,제출료일충기우조건수적자괄응공솔분배방안,즉재급정유한반궤비특적전제하,실현최우적공솔공제。해방안지수인입소량반궤신식,재발송단진행공솔분배,대우급정적조건수구간,선택상응적발송공솔。방진결과표명,해공솔분배방안유효지강저료오정솔,제고료계통용량。
One form of coordinated multiple point communications, Interference alignment ( IA ) , can see it as a distributed multiple?input multiple?output( MIMO) implementation. It can effectively improve system capacity and reliability. However, the current study was based on a given power;it does not take full advantage of the system’s total power.Firstly,based on the concept of channel matrix condition number,which effectively responds to the channel situation,a feedback mechanism for the optimal power distribution is proposedinvertical bell labs layered space?time coding(V?BLAST)MIMO system.The scheme utilized condition number as the small amount of feedback,and the power distribution was made according tocondition number ranges. Simulation results show that the power distribution scheme based on limit feedback effectively reduced error frame rate and improved the system throughput.