基于干扰对齐和波束赋形的多中继传输机制

Multi-Relay Transmission Mechanism Based on Interference Alignment and Beamforming

针对多中继两跳多输入多输出系统,提出了一种中继传输方案和干扰对齐算法.该方案在发送端和中继间采用发送波束赋形技术,实现频谱的高效利用;中继向接收端转发时,采用干扰对齐技术.给出了一种接收端低计算量的干扰消除算法.仿真结果表明,利用该传输方案,能实现较高的系统容量和能量效率.

For the multi-relay two-hop multiple input multiple output system,a kind of relay transmission scheme and interference alignment algorithm is put forward.Firstly,the transmitting beamforming is adopted by the scheme between sources and relays to utilize the spectrum efficiently.Then the relays forward the signals using interference alignment technology.Finally,the interference is eliminated at the ends with a low computation interference eliminate algorithm.Simulations show that the transmission scheme can achieve better system capacity and energy efficiency.