Mitigating Error Propagation Algorithm for Iterative Multi-user Detection of Turbo Coded STBC Systems
Turbo编码STBC系统中削弱误差传播的迭代多用户检测技术

Space-Time Coding (STC) techniques, which combine antenna array signal processing and channel coding techniques, are very promising approaches to substantial capacity increase in wireless communications. In order to restrain the interference of co-channel users using Space-Time Block Coding (STBC), the anti-interference techniques is becoming a hot issue and the so-called “turbo multi-user detection” is applied in flat-fading channels. During iterations, extrinsic information is computed and exchanged between a soft decision multi-user detector (SDMUD) and a bank of turbo decoders, to achieve successively refined estimates of the users’ signals. The simulations show that the proposed iterative receiver provides significant performance improvement conventional noniterative methods around 2dB in both single-user and multi-user STBC systems. Furthermore, multi-user space-time processing techniques offer substantial performance gains by using more receive antennas.