【摘要】 利用分层的代数方法,提出了一种新型的应用于时间选择性平坦衰落信道下的多输入多输出系统的空时多普勒码字,该码字能在符号速率达到Nt的情况下同时获得最大分集增益NtNrN(bQ+1),也就是发送天线数Nt、接收天线数Nr、编码符号块的数目Nb以及信道复指数基的个数(Q+1)的乘积。仿真结果表明,与已有空时多普勒码字相比,所设计的码字可以获得更高的分集增益。更多还原

【Abstract】 Relying on a layered algebraic design,we derive a new Space-Time-Doppler(STD) code for Multiple Input Multiple Output(MIMO) time-selective fading channels.The proposed STD code achieves rate Nt and enables full-diversity NtNrNb(Q+1),i.e.,the product of the number of transmit antennas Nt,receive antennas Nr,coding blocks Nb and channel complex exponential bases(Q+1).Simulation results show that the proposed STD codes achieve higher diversity gain in time-selective channels than some existing STD codes.更多还原