CAJ | 학술논문

针对贝尔实验室分层空时码（BLAST）容量性能好和正交空时分组码（STBC）分集增益高的特点,阐述了两系统混合研究的优点和可能。首先简要地介绍了三种常见BLAST发射空时数据流结构的工作原理,分析了3种常用的BLAST混合STBC的系统结构。以垂直BLAST（VBLAST）为对象,总结了常见的VBLAST的译码算法。然后介绍了QR译码原理,提出了一种基于QR分解的循环迭代算法,并将其引入STBC-VBLAST混合系统。仿真实验表明：STBC-VBLAST混合系统在保留VBLAST高频谱利用率的同时,也改善了系统的抗衰落性能,适当的循环迭代次数,系统抗衰落性能改善更加明显。最后综述了STBC-VBLAST混合系统未来应用和实现可能遇到的问题和面临的挑战。
침대패이실험실분층공시마（BLAST）용량성능호화정교공시분조마（STBC）분집증익고적특점,천술료량계통혼합연구적우점화가능。수선간요지개소료삼충상견BLAST발사공시수거류결구적공작원리,분석료3충상용적BLAST혼합STBC적계통결구。이수직BLAST（VBLAST）위대상,총결료상견적VBLAST적역마산법。연후개소료QR역마원리,제출료일충기우QR분해적순배질대산법,병장기인입STBC-VBLAST혼합계통。방진실험표명：STBC-VBLAST혼합계통재보류VBLAST고빈보이용솔적동시,야개선료계통적항쇠락성능,괄당적순배질대차수,계통항쇠락성능개선경가명현。최후종술료STBC-VBLAST혼합계통미래응용화실현가능우도적문제화면림적도전。
For the character of high capacity of the layer space-time code and full diversity gain of space- time block code, it describes the advantage and the potential of STBC-BLAST hybrid system. The com- mon operation principle of BLAST launching space-time data stream structure is briefly introduced, and three popular structures of STBC-BLAST hybrid system are analyzed. By VBLAST, it summarizes the common VBLAST decoding algorithm. QR decoding principle is given, and iterative loop algorithm based on the QR decomposition is proposed and introduced into STBC-VBLAST hybrid system. A large number simulation results show that STBC-VBLAST hybrid system keeps high spectral efficiency of BLAST, and also improves the anti-fading performance of the system, the anti-fading performance improvement is more obvious while loop iterations is appropriate. Finally it discusses the problems and challenges of STBC- VBLAST hybrid system in future application and realization.