基于中继能量收集的协作通信中的吞吐量分析

研究了无线协作通信系统中基于中继能量收集的吞吐量最大化问题。首先对源端单天线工作模型的吞吐量进行了分析,由于无初始能量,中继需要对源端发射的射频信号进行能量收集,当收集的能量达到阈值后,中继将源端发射的信号放大转发至目的端。然后提出源端双天线工作模型,中继同时从两根天线发射的信号中收集能量,当中继收集的能量达到阈值后也同样把信息转发给目的端,在一个时隙内,两个信道中只要有一个信道完成信息转发即拥有吞吐量。仿真分析验证了表达式的正确性,仿真结果还表明提出的源端双天线通信模型的性能优于单天线模型。

The Throughput Analysis in Cooperative Communication based on Relaying Energy Harvesting

In this paper, the throughput maximization problem based on relaying energy harvesting in wireless cooperative communication systems was studied. At first, the throughput problem was analyzed by single-antenna working model, which a relay without initial energy starts to collect energy when the RF signal is transmitted by single-antenna of source, then the signal will be amplified and sent to the destination when the energy reached the threshold. Then a dual-antenna working model at the source is proposed, which relay collects energy from the signal transmitted by two antennas at the same time, and after the energy collected by the relay reached the threshold, the signal is also amplified and sent to destination. In a time slot, the throughput will be obtained as long as one of the two channels completes the information forwarding. The simulation results coincided perfectly with the derived throughput expression, which shows the correctness of the expression. The simulation results also show that performance of the proposed dual-antenna communication model at the source is better than the single-antenna model.