双向中继网络编码系统的迭代干扰抑制研究

Iterative interference suppression in two-way relay system with network coding

在双向中继去噪转发(denoise and forward,DNF)网络编码的多址接入系统中,相互通信的配对用户共用一个多址资源块,使多址接入系统中用户之间的多址干扰减少一半,并设计了DNF网络编码中配对用户共用扩频码的通信模式。通过对DNF网络编码系统多址接入时不同配对用户的干扰进行建模,提出了基于Turbo迭代干扰抑制算法。通过仿真验证了使用DNF网络编码时,用户对共用多址接入资源块的可行性,相应的干扰抑制算法的有效性,以及对系统性能带来的提升。

In two-way relay system,the multiple accesses are used to denoise and forward（DNF） the network coded information.The paired users are communicated with the same resources,which decreases the interference to half of traditional multiple accesses.The CDMA are used to design the communication mode of multiple paired users.With the CDMA network coding system,the DNF interference is modeled,and the iterative interference suppression is proposed to get the system gain.The simulations verified the feasibility of the same multiple access for paired users,the validity of algorithm for interference suppression and the system performance gain.