Integrated data and energy transfer (IDET) has been of fundamental importance for providing both wireless data transfer (WDT) and wireless energy transfer (WET) services towards low-power devices. Fluid antenna (FA) is capable of exploiting the huge spatial diversity of the wireless channel to enhance the receive signal strength, which is more suitable for the tiny-size low-power devices having the IDET requirements. In this letter, a multiuser FA assisted IDET system is studied and the weighted energy harvesting power at energy receivers (ERs) is maximized by jointly optimizing the port selection and transmit beamforming design under imperfect channel state information (CSI), while the signal-to-interference-plus-noise ratio (SINR) constraint for each data receiver (DR) is satisfied. An efficient algorithm is proposed to obtain the suboptimal solutions for the non-convex problem. Simulation results evaluate the performance of the FA-IDET system, while also demonstrate that FA outperforms the multi-input-multi-output (MIMO) counterpart in terms of the IDET performance, as long as the port number is large enough.

翻译：集成数据与能量传输（IDET）对于向低功耗设备提供无线数据传输（WDT）和无线能量传输（WET）服务具有根本重要性。流体天线（FA）能够利用无线信道巨大的空间分集来增强接收信号强度，更适合具有IDET需求的微小尺寸低功耗设备。本文研究了多用户FA辅助的IDET系统，通过联合优化端口选择和发射波束赋形设计，在不完美信道状态信息（CSI）条件下最大化能量接收机（ER）的加权能量采集功率，同时满足每个数据接收机（DR）的信干噪比（SINR）约束。针对该非凸问题，提出了一种高效算法以获取次优解。仿真结果评估了FA-IDET系统的性能，同时表明只要端口数量足够大，FA在IDET性能方面优于多输入多输出（MIMO）方案。