本文结合了空时发射分集技术能够有效地对抗信道衰落、提高系统容量和多载波码分多址(MC CDMA)具有高效频谱利用率、对频率选择性信道鲁棒性的优点,提出了CDMA系统中两种新的空时发射分集方法,研究了这两种空时发射分集方法在MIMO MC-CDMA系统中的应用,并与基于空时分组编码的发射分集方法分别在MIMOCDMA和MIMO MC-CDMA两种系统下进行了仿真比较.
Two novel STrD scheme in CDMA system which combine the advantage of combating fading and improving the capacity of the spatial dme transmit diversity (STTD) with the advantage of high efficiency of spectrum and robusmess to the frequency selective channel of the multi-carrier code division multiple access (MC-CDMA) are proposed in this paper, the application of the two scheme in MIMO MC-CDMA system is also studied, we compared and simulated the proposed two scheme with the convenfional STTD based on the spatial time block code (STBC) in MIMO CDMA system and MIMO MC-CDMA system respectively.