一种基于空时码的双发单收分集方案

A dual-single-receiving diversity scheme based on space-time codes

针对室内密集环境产生的多径衰落、信噪比降低和信号频繁失锁等问题,提出了一种基于双发单收模型天线分集的技术方案。在信号发射前加入空时编码技术,在接收端进行信道频域估计,将空时解码后的时域信号通过最大比合并算法处理。仿真结果表明,与双发双收空间频率分集和双发单收空间分集相比,该方案得到的接收信号信噪比更高,可更好地减小多径效应,具有信噪比性能高和实现复杂度低的特点。

Aiming at the problem of multi-path fading,reduced signal-to-noise ratio and frequent loss of signal lock in indoor dense environment,a new antenna diversity scheme based on dual-transmission and single-receipt antenna is proposed.Adding space-time coding technology before signal launch and channel frequency estimation is performed on the receiving end,the time domain signal after decoding is processed by the maximum ratio merge algorithm.The simulation results show that compared with the dual-income and dual-receiving spatial frequency diversity and the dual-incidence and single-receiving spatial diversity,the signal-to-noise ratio of the received signal obtained by the algorithm is higher,the multipath effect can be better reduced,and the signal-to-noise ratio performance is high.And to achieve low complexity features.