基于坐标间交织正交设计的空时分组码方案

依据空时分组码的复正交设计理论的推广,推导了基于坐标间交织正交设计（CIOD）的空时分组码设计方法,并根据Alamouti正交接收原理,对接收信号依次经过矢量正交变换、矢量虚部交换和矢量加权旋转处理,进行解调运算。最后在准静态平坦Rayleigh衰落信道中,对802.16d/e中使用的4发射天线基于CIOD的发射分集配置方案A进行了性能仿真,结果表明这些码具有较低的译码复杂性,与基于复数正交设计的空时分组码的译码复杂度相当,但性能要好。

A Scheme of Space-Time Block Coding Based on CIOD

Space-Time Block Coding （STBC） based on Coordinate Interleaved Orthogonal Designs （CLOD） is put forward according to the theory of generalized orthogonal designs. In accordance with the principle of Alamouti＇s orthog- onal receiver, the received signals are processed through vector orthogonal transform, imaginary part exchange and vector-weighted spin processing, then we complete the demodulation process. Finally, simulations for the transmit diversity CIOD configuration A with 4Tx ClOD in 802.16d/e were made under quasi-static Rayleigh flat-fading channel. The results show that these codes have low decoding complexity and similar decoding complexity with STBC based on the complex orthogonal design. However, the former can get slightly better performance.