Blast结构SUC检测的容量优化

Optimal Capacity Method of Blast Architecture for SUC Detection

在分析Blast各态历经信道容量的基础上,提出了一种优化的天线能量分配方式,通过容量上界分析证明,采用这种能量分配方案,可以使Blast信道历经容量最大化.仿真结果表明,在信噪比较低的情况下,信道容量比采用天线平均能量分配方式有较明显的改善.

When a blast system employs the successive interference cancellation （SUC） method to detect signal, the diversity orders of transmitter antennas are not equal to each other, resulting in the different statistical characteristic among the channels of different transmitter antennas. In this case, the antenna average energy allocation （AAEA） method is not optimal in achieving the largest channel capacity. In this paper, based on analysis of channel ergodic capacity of a blast system, an antenna optimization energy allocation （AOEA） method is proposed. It is proved by capacity upperbound analysis that, by employing this method, channel ergodic capacity can be maximized. Simulation results show that channel capacity is improved at low SNR with the AAOA method.