摘要
研究了分布式无线通信系统(DWCS)中线性疏散码(LDC)的码字生成算法.由于传统LDC码字生成条件被破坏,故不适用于DWCS.为此提出了一种分布式协同的LDC码字基矩阵生成算法.该算法适合于地理上离散分布的多天线系统的联合协同通信,可以有效地利用移动台和基站间不同的大尺度衰落特性,并且该算法以最小化LDC线性变换矩阵的列相关性为准则,降低了码字基矩阵的生成复杂度.在单小区中的仿真结果表明,分布式LDC编码可以取得比传统LDC编码更好的性能.
An algorithm of codeword design for linear disperse coding （LDC） was studied in distributed wireless communication systems （DWCS）. Due to the destruction of the condition for traditional codeword design, traditional LDC is not suitable for DWCS. Hence, an algorithm of codeword design for distributed linear disperse coding （D-LDC） was proposed. Making use of the nonidentity of the big scale fading between mobile stations and base stations, the proposed algorithm was suitable for cooperative conmaunication systems with multiple antennas distributed in various geographical locations. The complexity of DLDC codeword design was reduced by following the criterion of minimum corrdativity of linear transformation matrix. Simulation results in a single cell indicate that D-LDC can provide better performance than traditional LDCs.
基金
国家自然科学基金(60572066)资助
关键词
分布式无线通信系统
协同通信
线性疏散码
distributed wireless communication system
cooperative communication
linear disperse coding
