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首页> 外文期刊>IEEE Transactions on Communications >SWIPT Signaling Over Frequency-Selective Channels With a Nonlinear Energy Harvester: Non-Zero Mean and Asymmetric Inputs
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SWIPT Signaling Over Frequency-Selective Channels With a Nonlinear Energy Harvester: Non-Zero Mean and Asymmetric Inputs

机译：使用非线性能量采集器的频率选择通道上的SWIPT信令：非零均值和非对称输入

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摘要

Simultaneous wireless information and power transmission (SWIPT) over a point-to-point frequency-selective channel is studied. Leveraging a small-signal model for a nonlinear energy harvester, a general form of the delivered power in terms of system baseband parameters is derived, which demonstrates the dependency of the delivered power on higher moments of the baseband channel input. The optimization problem of maximizing rate-power (RP) region is studied. Assuming that the channel state information (CSI) is available at both the receiver and the transmitter, and constraining to the non-zero mean Gaussian input distributions, an optimization algorithm for power allocation among different subchannels is studied. As a special case, optimality conditions for zero mean Gaussian inputs are derived. Results obtained from the numerical optimization demonstrate the superiority of the non-zero mean Gaussian inputs (with asymmetric power allocation in each complex subchannel) in yielding a larger RP region compared to their zero mean and non-zero mean (with symmetric power allocation in each complex subchannel) counterparts. The results motivate the design of new modulation for SWIPT and contrast with the SWIPT design under linear energy harvesting, for which the circularly symmetric Gaussian inputs with water-filling power allocation are optimal.
机译：研究了通过点对点频率选择信道进行的同时无线信息和功率传输（SWIPT）。利用用于非线性能量收集器的小信号模型，得出了系统基带参数形式的输出功率的一般形式，这表明了输出功率对基带通道输入的更高阶跃的依赖性。研究了最大化速率功率（RP）区域的优化问题。假设信道状态信息（CSI）在接收器和发送器上均可用，并且约束非零平均高斯输入分布，研究了在不同子信道之间进行功率分配的优化算法。作为一种特殊情况，推导了零均值高斯输入的最优条件。从数值优化获得的结果表明，与零均值和非零均值（每个对称功率分配中的均值）相比，非零均值高斯输入（每个复杂子通道中具有不对称的功率分配）在产生更大的RP区域方面具有优越性。复杂子频道）对应。结果激励了针对SWIPT的新调制的设计，并且与线性能量收集下的SWIPT设计形成了鲜明对比，为此，具有充水功率分配的圆形对称高斯输入是最佳的。

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