We propose an interference-based wireless powered communication system in which an energy constrained source harvests energy from a single dominant co-channel interferer and then transmits information to a destination equipped with $N$ receive antennas. Assuming interference dominates noise power at the destination and the receive antenna that maximizes the signal-to-interference ratio is selected, we investigate the average throughput for the delay-limited and delay-tolerant transmission modes. In particular, we derive an analytical expression of the average throughput for the delay-limited transmission mode, and a precise lower bound on the average throughput for the delay-tolerant transmission mode. Furthermore, we derive simplified asymptotic expressions of the average throughput for both transmission modes assuming asymptotically large number of receive antennas (i.e., $N \rightarrow \infty$). We use the obtained asymptotic expressions to derive insightful closed-form expressions for the optimal energy harvesting time, which maximizes the average throughput, for both transmission modes. We show that the throughput-optimal energy harvesting time for the delay-limited and the delay-tolerant transmission scale like $O (\frac{1}{\sqrt{N}})$ and $ O (\frac{1}{ \log (N)})$, respectively, for asymptotically large $N$.

中文翻译：

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具有接收天线选择的基于干扰的无线供电通信的吞吐量

我们提出了一种基于干扰的无线供电通信系统，其中能量受限源从单个主要同信道干扰源收集能量，然后将信息传输到配备有 $N$接收天线。假设在目的地干扰占主导地位的噪声功率，并且选择了最大化信号干扰比的接收天线，我们研究了延迟限制和延迟容忍传输模式的平均吞吐量。特别地，我们推导出延迟限制传输模式的平均吞吐量的解析表达式，以及延迟容忍传输模式的平均吞吐量的精确下限。此外，我们推导出两种传输模式的平均吞吐量的简化渐近表达式，假设接收天线数量渐近（即，$N \rightarrow \infty$）。我们使用获得的渐近表达式为两种传输模式得出最佳能量收集时间的有见地的封闭形式表达式，从而最大化平均吞吐量。我们展示了延迟受限和延迟容忍传输规模的吞吐量最佳能量收集时间，如$O (\frac{1}{\sqrt{N}})$ 和 $ O (\frac{1}{ \log (N)})$，分别对于渐近大 $N$.