一种新的准正交空时分组码的设计

Design of a Novel QO-STBC Scheme

ABBA码是一种可用于3个以上发射天线系统的准正交空时分组码,该方案虽然可以实现全速率传输,但是其译码复杂度高。针对上述缺点提出了一种基于星座旋转的能够实现满分集增益、全速率传输的准正交空时分组码,给出了接收端最大似然译码的独立译码方案,简化了译码过程,降低了译码复杂度,仿真结果表明其误码性能与ABBA码相比得到了较大的改善。

ABBA code is a quasi-orthogonal space-time block code for systems using more than three Tx antennas.This scheme achieves full rate transmission,but at the cost of high decoding complexity.To address this problem,a new full rate QO-STBC based on constellation rotation is proposed in this paper.The proposed scheme uses maximum-likelihood decoding which can reduce the decoding complexity at the receiver.The simulation results demonstrate that the BER performance is significantly improved compared with ABBA scheme.