CAJ | 학술논문

在多输入输出（Multiple-InputMultiple-Output，MIMO）系统中提出一种块分组编码与VBLAST的联合编码方案，该方案对最先检测的2层数据流采用块分组编码，其余层采用垂直分层空时码（Vertical Bell Layered Space-TimeCod，VBLAST）的编码方式，MIMO系统同时具有了空时分组码（SpaceTimeBlockCode，STBC）可以降低误码率的优点与VBLAST能够提高系统容量的优点。块分组编码将数据符号按层分块后交叉通过不同的天线对发射，数据流之间产生了一定交织效果，使编码获得了更好的分集增益，在接收端结合QR分解的最大似然解码算法进行解码。仿真结果表明该联合编码方案与传统的Alamouti编码和VBLAST的联合编码方案相比误码率性能有较大改善。
재다수입수출（Multiple-InputMultiple-Output，MIMO）계통중제출일충괴분조편마여VBLAST적연합편마방안，해방안대최선검측적2층수거류채용괴분조편마，기여층채용수직분층공시마（Vertical Bell Layered Space-TimeCod，VBLAST）적편마방식，MIMO계통동시구유료공시분조마（SpaceTimeBlockCode，STBC）가이강저오마솔적우점여VBLAST능구제고계통용량적우점。괴분조편마장수거부호안층분괴후교차통과불동적천선대발사，수거류지간산생료일정교직효과，사편마획득료경호적분집증익，재접수단결합QR분해적최대사연해마산법진행해마。방진결과표명해연합편마방안여전통적Alamouti편마화VBLAST적연합편마방안상비오마솔성능유교대개선。
A block coding and VBLAST joint encoding scheme is proposed in multiple-input muRlple-output （MIMO） systems. In this scheme, the block coding is used for the first two layers detected and the VBLAST coding scheme is used for other layers. The system has the advantage of lower BER of STBC and higher capacity of VBLAST. The block coding symbols are transmitted decussately through different antenna groups after blocking by layers, then, there are some interleaving effects between the data flows so as to get better diversity gain. Decoding is done by the receiver with QR decomposition for maximum likelihood decoding algorithm. Simulation results show that the proposed joint encoding scheme improves the BER remarkably comparing with Alamouti coding and VBLAST hybrid coding scheme.