论文标题
具有单个LED灯的集成可见光定位和通信系统的最佳功率分配
Optimal Power Allocation for Integrated Visible Light Positioning and Communication System with a Single LED-Lamp
论文作者
论文摘要
在本文中，我们研究了具有单个LED灯的集成的可见光定位和通信（VLPC）系统。首先，通过利用VLC通道模型是接收器位置的函数的事实，我们提出了一个系统模型，该模型基于定位信息估算通道状态信息（CSI）而无需传输试验序列。其次，我们在定位误差方差上得出CRAMER-RAO下限（CRLB），并在接下来的键调制的情况下在可实现的速率上获得下限。第三，根据派生的性能指标，我们优化了功率分配以最大程度地减少CRLB，同时满足了停电概率约束。为了解决这个非凸优化问题，我们应用了条件价值危险（CVAR）和块坐标下降（BCD）方法的最差案例分布来获得可行的溶液。最后，数值结果揭示了关键系统参数的影响，例如中断概率，速率阈值，总功率阈值。
In this paper, we investigate an integrated visible light positioning and communication (VLPC) system with a single LED-lamp. First, by leveraging the fact that the VLC channel model is a function of the receiver's location, we propose a system model that estimates the channel state information (CSI) based on the positioning information without transmitting pilot sequences. Second, we derive the Cramer-Rao lower bound (CRLB) on the positioning error variance and a lower bound on the achievable rate with on-off keying modulation. Third, based on the derived performance metrics, we optimize the power allocation to minimize the CRLB, while satisfying the rate outage probability constraint. To tackle this non-convex optimization problem, we apply the worst-case distribution of the Conditional Value-at-Risk (CVaR) and the block coordinate descent (BCD) methods to obtain the feasible solutions. Finally, the effects of critical system parameters, such as outage probability, rate threshold, total power threshold, are revealed by numerical results.
