异构网络中安全SWIPT的最优传输波束成形

MISO SWIPT系统的联合发射波束成形和接收功率分配

Joint Transmit Beamforming and Receive Power Splitting for MISO SWIPT Systems

本文研究了一种多用户多输入单输出（MISO）下行链路同步无线信息和功率传输（SWIPT）系统，其中一组单天线移动台（MS）通过功率分配（PS）从多天线基站（BS）发送的信号中同时接收信息和能量。我们的目标是最小化在BS的总传输功率，通过联合设计发送波束成形矢量和接收PS比为所有MS在其给定的信号干扰加噪声比（SINR）的信息解码和收获的能量收获的功率约束下。首先，我们推导出我们所提出的问题的可行性的充分必要条件。接下来，我们解决这个非凸问题，通过应用半定松弛（SDR）的技术。我们证明了SDR确实是紧的，从而达到其全球最优。最后，我们提出了两个次优解决方案的复杂度低于最优解决方案的基础上分离的原则，发送波束成形和接收PS的优化，其中迫零（ZF）和SINR最优的发送波束成形方案，分别适用。

Secrecy Beamforming for SWIPT MISO Heterogeneous Cellular Networks

In this paper, we consider the secure transmission design for a multiple-input single-output Femtocell overlaid with a Macrocell in co-channel deployment. The Femtocell base station sends confidential messages to information receiving Femtocell users (FUs) and energy signals to energy receiving (ER) FUs while limiting the interference to Macrocell users (MUs). The ER FUs have the potential to wiretap the confidential messages. By taking fairness into account, we propose a sum logarithmic secrecy rate maximization beamforming design problem under the interference constraints for MUs and energy …

Secure Beamforming in Full-Duplex SWIPT Systems With Loopback Self-Interference Cancellation

Security is a critical issue in full duplex (FD) communication systems due to the broadcast nature of wireless channels. In this paper, joint design of information and artificial noise beamforming vectors is proposed for the FD simultaneous wireless information and power transferring (FD-SWIPT) systems with loopback self-interference cancellation. To guarantee high security and energy harvesting performance of the FD-SWIPT system, the proposed design is formulated as a secrecy rate maximization problem under energy transfer rate constraints. Although the secrecy rate maximization problem is no…

非线性能量收集模型下SWIPT系统的鲁棒波束形成

Robust Beamforming for SWIPT Systems with Non-linear Energy Harvesting Model

本文研究了基于非线性能量收集模型的无线信息和功率同步传输（SWIPT）下行链路系统的资源分配。资源分配算法设计被公式化为用于最大化总收获功率的非凸优化问题。建议的问题制定不仅考虑到不完美的信道状态信息（CSI），但也保证了服务质量（QoS）的信息传输。提出了一种新的迭代算法来获得所考虑的非凸优化问题的全局最优解。在每次迭代中，一个秩约束半定规划（SDP）的最优解的SDP松弛。仿真结果表明，所提出的最优资源分配的收获功率和对CSI不完美的鲁棒性的显着增益，相比，为完美的CSI和传统的线性能量收集模型设计的基线方案。

全双工SWIPT系统中的安全波束形成

Secure Beamforming in Full-Duplex SWIPT Systems

由于无线信道的广播特性，物理层安全是全双工（FD）通信系统中的关键问题。提出了一种适用于频分多址无线信息与功率同步传输（FD-SWIPT）系统的信息与人工噪声波束赋形向量联合设计方法。为了保证FD-SWIPT系统的高安全性和能量收集性能，所提出的设计被制定为信息泄漏和能量约束下的和信息传输速率（SITR）最大化问题。此外，我们考虑的公平性问题之间的上行链路和下行链路的信息传输速率制定一个\mbox{fairness-aware} SITR最大化问题。虽然公式化的\mbox{SITR-maximization}和\mbox{fairness-aware} \mbox{SITR-maximization}问题是非凸的，我们解决他们通过半定松弛和一维搜索。我们提出的算法的最优性从理论上证明，并建立计算复杂度。此外，我们提出了两个次优的解决方案，制定的优化问题。在SITR最大化问题方面，数值结果表明，随着FD-BST最大发射功率的增加，两种次优算法中的一种算法的性能接近最优算法的性能。

能量有效的SWIPT系统的多目标波束形成

Multi-Objective Beamforming for Energy-Efficient SWIPT Systems

本文研究了能量高效的无线信息与功率同步传输（SWIPT）系统的资源分配算法设计。所考虑的系统包括发射器、信息接收器和配备有多个天线的多个能量收集接收器。我们提出了一个多目标优化框架来研究信息传输的能量效率最大化和无线功率传输效率最大化之间的权衡。所提出的问题制定考虑到每个天线电路的功率消耗的发射机和不完善的信道状态信息的能量收集接收机。将所采用的非凸多目标优化问题转化为等价的秩约束半定规划（SDP），并利用SDP松弛法进行优化求解。数值结果揭示了一个有趣的权衡考虑冲突的系统设计目标，并揭示了多个发射天线的好处，提高系统的能源效率。

Optimal Beamforming and Time Allocation for Partially Wireless Powered Sensor Networks with Downlink SWIPT

Wireless powered sensor networks (WPSNs) have emerged as a key development towards the future self-sustainable Internet of Things (IoT) networks. To achieve a good balance between self-sustainability and reliability, partially WPSNs with a mixed power solution are desirable for practical applications. Specifically, most of the sensor nodes are wireless powered but the key sensor node adopts traditional wire/battery power for reliability. As a result, this paper mainly investigates optimal design for the partially WPSNs in which simultaneous wireless information and power transfer (SWIPT) is ad…

Energy Efficient Delay Sensitive Optimization in SWIPT-MIMO

In this paper, we consider joint antenna selection and optimal beamforming for energy efficient delay minimization. We assume multiple-input multi-output (MIMO) system with full duplex simultaneous wireless information and power transfer (FD-SWIPT) where each sensor is equipped with a power splitting (PS) system and can simultaneously receive both energy and information from the aggregator (AGG). We show that the antenna selection and beamforming power control policies are adaptive to the energy state information (ESI), the queue state information (QSI) and the channel state information (CSI).…

Joint Beamforming Design and Power Splitting Optimization in IRS-Assisted SWIPT NOMA Networks

This paper proposes a novel network framework of intelligent reflecting surface (IRS)-assisted simultaneous wireless information and power transfer (SWIPT) non-orthogonal multiple access (NOMA) networks, where IRS is used to enhance the NOMA performance and the wireless power transfer (WPT) efficiency of SWIPT. We formulate a problem of minimizing base station (BS) transmit power by jointly optimizing successive interference cancellation (SIC) decoding order, BS transmit beamforming vector, power splitting (PS) ratio and IRS phase shift while taking into account the quality-of-service (QoS) re…

Joint Transmit and Reflective Beamforming Design for IRS-Assisted Multiuser MISO SWIPT Systems

This paper studies an intelligent reflecting surface (IRS)-assisted multiuser multiple-input single-output (MISO) simultaneous wireless information and power transfer (SWIPT) system. In this system, a multi-antenna access point (AP) uses transmit beamforming to send both information and energy signals to a set of receivers each for information decoding (ID) or energy harvesting (EH), and a dedicatedly deployed IRS properly controls its reflecting phase shifts to form passive reflection beams for facilitating both ID and EH at receivers. Under this setup, we jointly optimize the (active) inform…

基于SWIPT的安全MISO认知无线电的鲁棒AN辅助波束形成和功率分配设计

Robust AN-Aided Beamforming and Power Splitting Design for Secure MISO Cognitive Radio With SWIPT

研究了一种同时进行无线信息和功率传输的多输入单输出认知无线电下行网络。在该网络中，次级用户与多个主用户和多个能量收集接收器共存。为了保证安全通信和能量收集，研究了不完全信道状态信息（CSI）下鲁棒安全人工噪声辅助波束形成和功率分配设计问题。具体而言，发射功率最小化问题和最大-最小公平能量收集问题，制定了有界CSI误差模型和概率CSI误差模型。这些问题是非凸的，解决起来很有挑战性。针对这些问题，提出了一种一维搜索算法，在有界CSI误差模型下基于${\cal S}\text{-Procedure} $，在概率CSI误差模型下基于Bernstein型不等式.结果表明，最佳的鲁棒安全波束形成下的有界CSI误差模型可以实现，而一个次优波束形成的解决方案下的概率CSI误差模型可以得到。阐明了在最大最小公平性准则下，次用户接收机的保密率与能量收集接收机所收集的能量之间的折衷。

Robust Beamforming for AN Aided MISO SWIPT System with Unknown Eavesdroppers and Non-linear EH Model

This work studies a beamforming design for downlink transmission of a multi-user multiple-input single-output (MISO) system where each legitimate user employs a power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) technique. The transmitter intends to send confidential information to its legitimate users in the presence of purely unknown eavesdroppers. Since the transmitter does not have any knowledge of the eavesdroppers' channel state information (CSI), we consider an artificial noise (AN) approach to establishing secure communication. This beamforming desi…

IRS-Aided SWIPT: Joint Waveform, Active and Passive Beamforming Design Under Nonlinear Harvester Model

The performance of Simultaneous Wireless Information and Power Transfer (SWIPT) is mainly constrained by the received Radio-Frequency (RF) signal strength. To tackle this problem, we introduce an Intelligent Reflecting Surface (IRS) to compensate the propagation loss and boost the transmission efficiency. This paper proposes a novel IRS-aided SWIPT system where a multi-carrier multi-antenna Access Point (AP) transmits information and power simultaneously, with the assist of an IRS, to a single-antenna User Equipment (UE) employing practical receiving schemes. Considering harvester nonlinearity…

Mixed-Timescale Beamforming and Power Splitting for Massive MIMO Aided SWIPT IoT Network

Traditional simultaneous wireless information and power transfer (SWIPT) with power splitting assumes perfect channel state information (CSI), which is difficult to obtain especially in the massive multiple-input-multiple-output (MIMO) regime. In this letter, we consider a mixed-timescale joint beamforming and power splitting (MJBP) scheme to maximize general utility functions under a power constraint in the downlink of a massive MIMO SWIPT IoT network. In this scheme, the transmit digital beamformer is adapted to the imperfect CSI, while the receive power splitters are adapted to the long-ter…

下行协作SWIPT NOMA系统的联合波束成形和功率分配控制

Joint Beamforming and Power Splitting Control in Downlink Cooperative SWIPT NOMA Systems

研究了无线信息功率同步传输（SWIPT）在协作非正交多址接入（NOMA）中的应用。提出了一种新的协作多输入单输出（MISO）SWIPT NOMA协议，其中具有强信道条件的用户充当能量收集（EH）中继，以帮助信道条件较差的用户。EH继电器采用功率分流（PS）方案。通过联合优化PS比和波束成形向量，设计目标是在满足“弱用户”的QoS要求的同时最大化“强用户”的数据率。它归结为一个具有挑战性的非凸问题。为了解决这个问题，半定松弛（SDR）技术被用来放松与波束形成器相关的二次项，然后通过二维穷举搜索来求解其全局最优性。我们证明了秩一的最优性，建立放松的问题和原来的等价。为了进一步降低穷举搜索带来的高复杂度，提出了一种基于连续凸近似（SCA）的迭代算法，该算法至少可以有效地达到其稳定点。考虑到潜在的应用场景，例如，物联网，单输入单输出（SISO）的情况下，合作SWIPT NOMA系统也进行了研究。公式化的问题被证明是严格单峰的PS比。因此，黄金分割搜索（GSS）为基础的算法，在每一步的封闭形式的解决方案，提出了找到唯一的全局最优解。值得指出的是，SCA方法也可以收敛到SISO情况下的最优解。在数值模拟中，该算法的数值收敛在几个迭代，和SWIPT辅助NOMA协议优于现有的传输协议。

AN辅助安全多用户MIMO SWIPT系统的波束成形和功率分配设计

Beamforming and Power Splitting Designs for AN-aided Secure Multi-user MIMO SWIPT Systems

本文研究了一种用于多用户多输入多输出（MIMO）保密信道和人工噪声（AN）传输的能量收集方案。在目标保密率、总发射功率和收获能量约束下，对发射波束形成矩阵、AN协方差矩阵和功率分配比进行联合优化，以最小化发射功率。原问题被证明是非凸的，这是解决了两层分解的方法。内层问题通过半定松弛法求解，而外层问题则是一个单变量优化问题，可以通过一维线搜索求解。为了降低计算复杂性，提出了一种序列参数凸逼近（SPCA）方法来寻找近似最优解。然后，工作扩展到不完美的信道状态信息的情况下，范数有界的信道误差。此外，所提出的计划的松弛的紧密性进行了验证，通过显示松弛问题的最优解是秩一。仿真结果表明，所提出的SPCA方法达到了相同的性能，基于1-D的方案，但具有更低的复杂度。

Cooperative Beamforming for Wireless Fronthaul and Access Links in Ultra-Dense C-RANs with SWIPT: A First-Order Approach

This work studies multigroup multicasting transmission in cloud radio access networks (C-RANs) with simultaneous wireless information and power transfer, where densely packed remote radio heads (RRHs) cooperatively provide information and energy services for information users (IUs) and energy users (EUs), respectively. To maximize the weighted sum rate (WSR) of information services while satisfying the energy harvesting levels at EUs, an optimization of joint beamforming design for the fronthaul and access links is formulated, which is however neither smooth nor convex and is indeed NP-hard. T…

A Joint Power Splitting, Active and Passive Beamforming Optimization Framework for IRS Assisted MIMO SWIPT System

This paper considers an intelligent reflecting surface (IRS) assisted multi-input multi-output (MIMO) power splitting (PS) based simultaneous wireless information and power transfer (SWIPT) system with multiple PS receivers (PSRs). The objective is to maximize the achievable data rate of the system by jointly optimizing the PS ratios at the PSRs, the active transmit beamforming (ATB) at the access point (AP), and the passive reflective beamforming (PRB) at the IRS, while the constraints on maximum transmission power at the AP, the reflective phase shift of each element at the IRS, the individu…

用于具有移动天线的 IRS 辅助 SWIPT 的联合波束成形和位置优化

Joint Beamforming and Position Optimization for IRS-Aided SWIPT with Movable Antennas

针对 SWIPT 中长距传播致能量传输效率低的问题，提出引入 IRS 和 MA 技术，通过联合优化基站和 IRS 的波束成形及 MA 位置来最大化 IDR 加权和速率，开发相关算法并给出可行性方法，仿真验证方案优势。

Secrecy Rate Maximization of RIS-assisted SWIPT Systems: A Two-Timescale Beamforming Design Approach

Reconfigurable intelligent surfaces (RISs) achieve high passive beamforming gains for signal enhancement or interference nulling by dynamically adjusting their reflection coefficients. Their employment is particularly appealing for improving both the wireless security and the efficiency of radio frequency (RF)-based wireless power transfer. Motivated by this, we conceive and investigate a RIS-assisted secure simultaneous wireless information and power transfer (SWIPT) system designed for information and power transfer from a base station (BS) to an information user (IU) and to multiple energy …

基于SWIPT的安全MISO认知无线电鲁棒最大最小公平能量收集

Robust Max-Min Fairness Energy Harvesting in Secure MISO Cognitive Radio With SWIPT

研究了一种多输入单输出的认知无线电下行链路网络，该网络同时进行无线信息和功率传输。在该网络中，次级用户与多个主用户和多个能量收集接收器共存。为了保证安全通信和能量收集，研究了不完全信道状态信息下鲁棒安全人工噪声辅助波束形成和功率分配设计问题。具体地说，最大-最小公平能量收集问题下制定的有界信道状态信息误差模型。提出了一种基于${\cal S}\text{-Procedure} $的一维搜索算法。结果表明，最佳的鲁棒安全波束形成可以实现。阐明了在最大-最小公平性准则下二级用户接收机的保密率与能量收集接收机收集的能量之间的权衡。

Beamforming Optimization for Active Intelligent Reflecting Surface-Aided SWIPT

In this paper, we study an active IRS-aided simultaneous wireless information and power transfer (SWIPT) system. Specifically, an active IRS is deployed to assist a multi-antenna access point (AP) to convey information and energy simultaneously to multiple single-antenna information users (IUs) and energy users (EUs). Two joint transmit and reflect beamforming optimization problems are investigated with different practical objectives. The first problem maximizes the weighted sum-power harvested by the EUs subject to individual signal-to-interference-plus-noise ratio (SINR) constraints at the I…

On the SINR Distribution of SWIPT MU-MIMO with Antenna Selection

In this paper, we provide a closed-form approximation of the Full-duplex Simultaneous wireless information and power transfer (SWIPT) multi-user MIMO (MU-MIMO) system signal-to-interference-and-noise ratio (SINR) distribution for the received signal at the sensor users with perfect and imperfect channel state information (CSI) and transmit antenna selection scheme at the transmitter. We also studied the SINR distribution of the uplink with Zero-Forcing beamforming (ZFBF) and antenna selection at the aggregator (AGG) receiver with transmit antenna selection. The downlink SINR with perfect and i…

MOO SWIPT系统下行链路发送预编码和接收机联合设计

Joint MOO of Transmit Precoding and Receiver Design in a Downlink Time Switching MISO SWIPT System

在本文中，我们考虑一个时间切换（TS）共址的同时无线信息和功率传输（SWIPT）系统由多个多天线接入点，服务于多个单天线用户。在这种情况下，我们提出了一个多目标优化（MOO）的框架，共同设计帕累托最优波束成形向量和TS比为每个接收机。目标是最大化效用向量，包括实现的数据率和所有用户同时收获的能量。该问题是一个非凸秩约束的多目标优化问题，通过加权Chebycheff方法将其松弛转化为一个非凸半定规划问题。利用优化极小化算法求解非凸SDP，并证明了最优解满足秩约束。我们还研究了在固定TS比的情况下，用同样的方法优化波束形成向量的问题。数值结果提供了两个协调的接入点与MISO配置。结果示出了所收获的能量和信息数据率目标之间的权衡，并且示出了优化预编码策略和TS比对该权衡的影响。

Max-Min Fair Energy-Efficient Beamforming Design for Intelligent Reflecting Surface-Aided SWIPT Systems with Non-linear Energy Harvesting Model

This paper considers an intelligent reflecting sur-face (IRS)-aided simultaneous wireless information and power transfer (SWIPT) network, where multiple users decode data and harvest energy from the transmitted signal of a transmit-ter. The proposed design framework exploits the cost-effective IRS to establish favorable communication environment to improve the fair energy efficient. In particular, we study the max-min energy efficiency (EE) of the system by jointly designing the transmit information and energy beamforming at the base station (BS), phase shifts at the IRS, as well as the power …

采用功率分割方案的MISO多播SWIPT系统的最大速率

Secrecy Rate Maximization for MISO Multicasting SWIPT System with Power Splitting Scheme

研究了多输入单输出多播同时无线信息和功率传输（SWIPT）系统中保密率最大化问题的发送协方差矩阵设计。为了提高系统的性能，在设计中将人工噪声（AN）添加到发送信号中，用于以下目的：降低窃听者处的接收信噪比（SNR）并增加收获的能量。我们假设所有的信道状态信息（CSI）是完全已知的发射机和所有合法的用户能够同时接收信息和收获能量。此外，所有的窃听者都是被动的，只有当他们没有拦截或窃听合法用户的消息时，他们才能收获能量。原始的保密率最大化问题是不凸的传输和人工协方差矩阵以及功率分裂（PS）比。为了避免这个非凸性问题，我们利用\emph{Charnes-Cooper}变换和半定松弛（SDR）将这个原始问题转化为凸问题。然而，这个凸问题并不总是产生秩一的传输和AN协方差矩阵，以获得原始问题的解决方案。因此，我们分析了最优条件，并利用高斯随机化（GR）的方法来构建秩一的解决方案，从非秩一的结果。仿真结果表明，所提出的发送协方差矩阵设计的MISO多播SWIPT系统的性能。

基于功率分配的放大转发全双工中继SWIPT

Amplify-and-Forward Full-Duplex Relay with Power Splitting-Based SWIPT

针对放大转发全双工中继网络，提出了一种基于功率分配的无线信息和功率同步传输的虚拟收获-发送模型和收获-发送-存储模型。中继节点采用由两个可充电电池组成的电池组。通过在每个传输块的两个连续时隙中在用于充电和放电的两个电池之间周期性地切换，每个块中的所有收集的能量已经被应用于虚拟收集-传输模型中的全双工传输。通过采用能量调度，中继节点在块级的收集、中继、收集-中继和空闲行为之间切换，使得块中收集的能量的一部分可以在收集-发送-存储模型中被调度用于未来使用。一个贪婪的切换策略被设计来实现收获-传输-存储模型，其中FDR节点发送时，其剩余能量确保在目的地解码。数值结果验证了所提出的方案的中断性能。

Transmit Precoding and Receive Power Splitting for Harvested Power Maximization in MIMO SWIPT Systems

We consider the problem of maximizing the harvested power in Multiple Input Multiple Output (MIMO) Simultaneous Wireless Information and Power Transfer (SWIPT) systems with power splitting reception. Different from recently proposed designs, with our optimization problem formulation we target for the jointly optimal transmit precoding and receive uniform power splitting (UPS) ratio maximizing the harvested power, while ensuring that the quality-of-service requirement of the MIMO link is satisfied. We assume practical Radio-Frequency (RF) energy harvesting (EH) receive operation that results in…

Conditional Capacity and Transmit Signal Design for SWIPT Systems with Multiple Nonlinear Energy Harvesting Receivers

We study information-theoretic limits for simultaneous wireless information and power transfer (SWIPT) systems employing nonlinear radio frequency (RF) energy harvesting (EH) receivers (Rxs). In particular, we consider a SWIPT system with one transmitter that broadcasts a common signal to an information decoding (ID) Rx and multiple EH Rxs. Owing to the nonlinearity of the EH Rxs' circuitry, the efficiency of wireless power transfer depends on the waveform of the transmitted signal. We aim to answer the following fundamental question: What is the optimal input distribution of the transmit sign…

Joint Active and Passive Beamforming Optimization for Intelligent Reflecting Surface Assisted SWIPT under QoS Constraints

Intelligent reflecting surface (IRS) is a new and revolutionizing technology for achieving spectrum and energy efficient wireless networks. By leveraging massive low-cost passive elements that are able to reflect radio-frequency (RF) signals with adjustable phase shifts, IRS can achieve high passive beamforming gains, which are particularly appealing for improving the efficiency of RF-based wireless power transfer. Motivated by the above, we study in the paper an IRS-assisted simultaneous wireless information and power transfer (SWIPT) system. Specifically, a set of IRSs are deployed to assist…

基于SWIPT和自能量回收的全双工系统的加权和发射功率最小化

Weighted Sum Transmit Power Minimization for Full-Duplex System with SWIPT and Self-Energy Recycling

该对应关系考虑由一个多天线全双工接入点（FD-AP）和一个双天线全双工移动站（FD-MS）组成的全双工（FD）点对点系统。本文采用同步无线信息和功率传输（SWIPT）方案，在FD-MS处应用自能量回收，联合设计FD-AP的发射波束形成向量、FD-MS的接收功率分配（PS）比以及FD-MS的发射功率值，以最小化加权和发射功率。应用半定松弛（SDR）方法得到了一个新的凸问题.我们进一步证明了这两个问题有完全相同的解。最后，仿真结果验证了我们的分析，并与半双工（HD）系统的比较表明，显着的性能增益自能量回收。

具有非线性能量收集电路的SWIPT系统的容量

On the Capacity of SWIPT Systems with a Nonlinear Energy Harvesting Circuit

在本文中，我们研究信息理论的限制，同时无线信息和功率传输（SWIPT）系统采用一个实用的非线性射频（RF）能量收集（EH）接收机。特别是，我们考虑一个三节点系统与一个发射机，广播一个共同的信号分离的信息解码（ID）和EH接收器。由于EH接收器电路的非线性，无线功率传输的效率显著地取决于发射信号的波形。在本文中，我们的目标是回答以下基本问题：什么是最佳的输入分布的发射波形，最大化的ID接收器的速率为一个给定的所需的收获功率在EH接收器？特别是，我们研究了在发射机的平均功率（AP）和峰值功率（PP）的限制和EH的限制下，在EH接收机的加性高斯白噪声（AWGN）受损的SWIPT系统的容量。使用Hermite多项式基地，我们证明了最佳的容量实现的输入分布，最大限度地提高率能区是唯一的和离散的有限数量的质量点。此外，我们还证明了当EH约束是有效的连续零均值高斯时，对于没有PP约束的同一问题，最优输入分布是离散的，否则。我们的数值计算结果表明，速率能量区域扩大了一个更大的PP约束和所考虑的SWIPT系统的速率损失相比，没有EH接收器的AWGN信道，通过增加AP预算减少。

干扰信道下的协同无线能量和信息传输

Collaborative Wireless Energy and Information Transfer in Interference Channel

研究了多用户无线通信系统中的无线信息与能量同步传输（SWIPT）问题，即分布式发射机向各自的接收机发送独立的信息，同时通过能量波束形成向接收机协同传输无线能量。因此，从无线信息传输（WIT）的角度来看，感兴趣的系统可以被建模为经典的干扰信道，同时它也可以被视为用于协作无线能量传输（WET）的分布式多输入多输出（MIMO）系统。为了在SWIPT中实现信息解码（ID）和能量收集（EH），我们在每个接收器处采用低复杂度时间切换操作以在预定时间内在ID和EH模式之间切换。基于这种混合模型，我们的目标是在不同的发送端协作方案下的多用户SWIPT系统中的可实现的速率-能量（R-E）的权衡。具体而言，为了促进协作能量波束成形，我们提出了一种新的信号分裂方案在发射机，其中每个发射信号通常是由一个信息信号分量和能量信号分量分别为WIT和WET。在此基础上，我们首先研究了两用户SWIPT系统，推导了接收端的最优模式切换规则和相应的发射信号优化，以实现衰落信道下各种R-E折衷。我们还比较了我们提出的方案的R-E性能与发射能量波束成形和信号分裂对两个现有的计划与部分或没有合作的发射机，并显示出显着的收益超过这些基线计划。最后，研究了多用户SWIPT系统的一般情况，提出并比较了两种实用的传输协作方案。

RIS-Assisted Cooperative NOMA with SWIPT

This paper studies the application of reconfigurable intelligent surface (RIS) to cooperative non-orthogonal multiple access (C-NOMA) networks with simultaneous wireless information and power transfer (SWIPT). We aim for maximizing the rate of the strong user with guaranteed weak user's quality of service (QoS) by jointly optimizing power splitting factors, beamforming coefficients, and RIS reflection coefficients in two transmission phases. The formulated problem is difficult to solve due to its complex and non-convex constraints. To tackle this challenging problem, we first use alternating o…

Information-Energy Capacity Region for SWIPT Systems with Power Amplifier Nonlinearity

We study the information-energy capacity region (IE-CR) of an additive white Gaussian noise (AWGN) channel in the presence of high-power amplifier (HPA) nonlinearity. Specifically, we consider a three-node network consisting of one transmitter, one information receiver and one energy receiver and we study the capacity-achieving input distribution under i) average-power, peak-power constraints at the transmitter, b) HPA nonlinearity at the transmitter, and c) nonlinearity of the energy harvesting circuit at the energy receiver. We prove that the input distribution is discrete and finite and we …

MISO SWIPT干扰信道下分散鲁棒收发机设计

Decentralized Robust Transceiver Designs for MISO SWIPT Interference Channel

本文考虑了一种用于同时无线信息和功率传输（SWIPT）的$K$ -用户多输入单输出（MISO）干扰信道，其中每个多天线发射机为每个用户对的单天线接收机服务。所有接收器基于接收功率分割（PS）架构同时执行信息处理和能量收集（EH）。假设不完美的信道状态信息（CSI）在发射机，我们开发了一个最佳的鲁棒收发器的设计方案，最大限度地减少了最坏情况下的信号与干扰加噪声比（SINR）和能量收集（EH）的限制下，在接收机的总发射功率，通过联合优化发射波束成形和接收PS比每个接收机。当CSI的不确定性是有界的椭球区域，它表明，最坏情况下的SINR和EH约束每个接收机可以重铸成二次矩阵不等式形式。利用半定松弛技术，预期的鲁棒波束形成和PS（BFPS）问题可以被松弛为易处理的（集中式）半定规划（SDP）。更重要的是，依靠最先进的交替方向乘法器（ADMM）在凸优化，我们提出了一个{ \em分散}算法能够计算最佳的鲁棒BFPS计划与本地CSI和有限的信息交换之间的发射机。结果表明，所提出的分散算法是保证收敛到最优的集中式解决方案。数值结果证明了所提出的方法的优点。

DEBIT：多路中继网络的分布式能量波束形成和信息传输

DEBIT: Distributed Energy Beamforming and Information Transfer for Multiway Relay Networks

在本文中，我们提出了一种新的分布式能量波束形成和信息传输（DEBIT）计划，实现同时无线信息和功率传输（SWIPT）在多路中继网络（MWRN），其中多个单天线用户通过一个能量受限的单天线中继节点交换信息。我们研究最佳的收发器设计，以最大限度地提高可实现的总和率或收获的功率。由此产生的和率最大化问题是非凸的，全局最优解可以通过三维搜索与传统的凸优化相结合来获得。为了降低计算复杂度，提出了一种次优DEBIT方案，使优化问题转化为线性规划问题。可实现的和速率性能进行了分析，并推导出一个封闭形式的下限MWRN与大量的用户。此外，我们考虑了目标和速率约束下的收获功率最大化问题，并推导出具有大量用户的MWRN的平均收获功率的下界。数值结果表明，DEBIT格式的性能明显优于传统的SWIPT格式，并且得到的下界是紧的。

一种基于随机波束形成的模式切换能量捕获方法

A Novel Mode Switching Scheme Utilizing Random Beamforming for Opportunistic Energy Harvesting

由于无线电信号同时携带能量和信息，因此关于同时无线信息和功率传输（SWIPT）的统一研究最近引起了人们对实现无线供电通信网络的极大关注。在本文中，我们研究了一个多输入单输出（MISO）多播SWIPT网络与一个多天线发射机发送共同的信息，多个单天线接收器同时随着机会主义的无线能量收集在每个接收器。从实际考虑，我们假设信道状态信息（CSI）仅在每个相应的接收机处是已知的，但在发射机处是不可用的。我们提出了一种新的接收机模式切换SWIPT方案的基础上的一个新的应用程序的传统的随机波束成形技术在多天线发射机，它产生人工信道衰落，使更有效的能量收集在每个接收机时，接收功率超过一定的阈值。对于所提出的方案，我们调查可实现的信息速率，收获的平均功率和/或停电概率，以及它们在AWGN和准静态衰落信道的各种权衡。与没有随机发射波束成形的周期性接收器模式切换的参考方案相比，当所收获的能量目标足够大时，所提出的方案被示出能够实现更好的速率-能量权衡。特别是，它揭示了采用一个单一的随机波束的建议计划是渐近最佳的发射功率增加到无穷大，也表现出最好的有限发射功率的高收获的能量制度的最实际的利益，从而导致一个有吸引力的低复杂度的实现。最后，我们比较了所提出的方案与不同的随机波束设计的速率-能量性能。

DMA辅助的MU-MISO系统用于功率分割SWIPT via Lorentzian约束全息术

DMA-Aided MU-MISO Systems for Power Splitting SWIPT via Lorentzian-Constrained Holography

本文提出了一种DMA辅助的MU-MISO系统，利用Lorentzian约束全息术优化功率分割和波束成形，以降低发射功率并提高SWIPT效率。

全双工SWIPT系统中的多目标资源分配

Multi-Objective Resource Allocation in Full-Duplex SWIPT Systems

在本文中，我们研究的资源分配算法设计全双工同时无线信息和功率传输（FD-SWIPT）系统。所考虑的系统包括FD无线电基站、多个单天线半双工（HD）用户和配备有多个天线的多个能量采集器。我们提出了一个多目标优化框架，研究上行链路发射功率最小化，下行链路发射功率最小化，总收获能量最大化之间的权衡。所考虑的优化框架考虑了上行链路和下行链路通信以及无线功率传输的异构服务质量要求。将非凸多目标优化问题转化为一个等价的秩约束半定规划问题，并利用半定规划松弛法进行优化求解。所提出的框架的解决方案的结果在一组帕累托最优的资源分配政策。数值结果揭示了一个有趣的权衡所考虑的冲突系统的设计目标，并揭示了提高功率效率促进FD在SWIPT系统相比，传统的HD系统。

Energy Efficiency Maximization for SWIPT Enabled Two-Way DF Relaying

This paper focuses on the design of an optimal resource allocation scheme to maximize the energy efficiency (EE) in a simultaneous wireless information and power transfer (SWIPT) enabled two-way decode-and-forward (DF) relay network under a non-linear energy harvesting model. In particular, we formulate an optimization problem by jointly optimizing the transmit powers of two source nodes, the power-splitting (PS) ratios of the relay, and the time for the source-relay transmission, under multiple constraints including the transmit power constraints at sources and the minimum rate requirement. A…

Energy Harvesting Fairness in AN-aided Secure MU-MIMO SWIPT Systems with Cooperative Jammer

In this paper, we study a multi-user multiple-input-multiple-output secrecy simultaneous wireless information and power transfer (SWIPT) channel which consists of one transmitter, one cooperative jammer (CJ), multiple energy receivers (potential eavesdroppers, ERs), and multiple co-located receivers (CRs). We exploit the dual of artificial noise (AN) generation for facilitating efficient wireless energy transfer and secure transmission. Our aim is to maximize the minimum harvested energy among ERs and CRs subject to secrecy rate constraints for each CR and total transmit power constraint. By i…

面向RIS辅助的大规模MIMO SWIPT IoT网络的相移与发射功率优化

Phase-Shift and Transmit Power Optimization for RIS-Aided Massive MIMO SWIPT IoT Networks

本研究针对RIS辅助大规模MIMO SWIPT IoT网络，提出联合优化BS发射功率与RIS相移的资源分配算法，在满足IU服务质量下最大化IoT设备收集能量，仿真显示平均收集能量提升132%。

安全SWIPT系统的无线协同干扰功率分配

Power Allocation for Secure SWIPT Systems with Wireless-Powered Cooperative Jamming

本文考虑无线供电的合作干扰（CJ），以确保发送器（Tx）和信息接收器（IR）之间的通信，在存在的能量接收器（ER），这被称为潜在的窃听者。全双工干扰器从Tx的信息信号中获取能量，同时发送干扰信号，其中干扰信号不仅混淆ER（潜在窃听者），而且还对ER充电。我们的目标是最大限度地提高保密信息率，通过联合优化在Tx和干扰机的功率分配，同时保持收获的能量要求的ER。所研究的问题是非凸的，我们提出了基于拉格朗日方法的最优解。仿真结果表明，该方案的性能明显优于基准方案。

Bi-objective Optimization of Information Rate and Harvested Power in RIS-aided SWIPT Systems

The problem of simultaneously optimizing the information rate and the harvested power in a reconfigurable intelligent surface (RIS)-aided multiple-input single-output downlink wireless network with simultaneous wireless information and power transfer (SWIPT) is addressed. The beamforming vectors, RIS reflection coefficients, and power split ratios are jointly optimized subject to maximum power constraints, minimum harvested power constraints, and realistic constraints on the RIS reflection coefficients. A practical algorithm is developed through an interplay of alternating optimization, sequen…

利用MISO波束成形的安全无线信息和功率传输

Secrecy Wireless Information and Power Transfer with MISO Beamforming

用于同时无线信息和功率传输（SWIPT）的无线电信号的双重使用最近引起了极大的关注。为了满足能量接收器（ER）以比信息接收器（IR）高得多的接收功率操作的实际要求，ER需要比IR更靠近发射器部署。然而，由于无线信道的广播性质，一个关键问题是发送到IR的消息不能被ER窃听，ER拥有来自发射机的更好的信道。在本文中，我们解决了这个新的保密通信问题，在多用户多输入单输出（MISO）SWIPT系统中，多天线发射机发送信息和能量同时一个IR和多个ER，每个与一个天线。通过优化发射波束形成向量及其功率分配，我们最大限度地提高了传输到ER的加权总能量，并对发送到IR的信息进行保密率约束。我们通过将其转化为两阶段问题来最优地解决这个非凸问题。首先，我们固定的信号与干扰加噪声比（SINR）在IR和获得最佳波束形成的解决方案，通过应用技术的半定松弛（SDR）。然后通过一维搜索最优SINR值来解决原问题。进一步，提出了两种次优的低复杂度波束形成方案，并将其可达（保密）率-能量（R-E）域与最优方案进行了比较。

Asymmetric Modulation Design for Wireless Information and Power Transfer with Nonlinear Energy Harvesting

Far-field wireless power transfer (WPT) and simultaneous wireless information and power transfer (SWIPT) have become increasingly important in radio frequency (RF) and communication communities recently. The problem of modulation design for SWIPT has however been scarcely addressed. In this paper, a modulation scheme based on asymmetric phase-shift keying (PSK) is considered, which improves the SWIPT rate-energy tradeoff region significantly. The nonlinear rectifier model, which accurately models the energy harvester, is adopted for evaluating the output direct current (DC) power at the receiv…

认知无线电网络中高效SWIPT传输的协作接入方案

Cooperative Access Schemes for Efficient SWIPT Transmissions in Cognitive Radio Networks

我们研究了时隙认知无线电网络中的联合信息和能量协作方案，该网络具有一个主收发器对和一组辅助收发器对。主发射器被假定为能量收集节点。我们提出了一个三阶段的合作传输协议。在第一阶段期间，主用户将其时隙的一部分释放给次节点以发送它们的数据并从次射频信号为能量收集主发射机供电。在第二阶段期间，主发送器将其数据发送到其目的地和次节点。在第三阶段，次级节点放大并转发初级数据。我们提出了五种不同的方案，二次接入和供电的主要发射机。我们推导出封闭形式的表达式为所有建议的计划的主要和次要的利率。所提出的方案中的两个使用分布式波束成形来为主发射机供电。基于压缩感知原理，设计了一种稀疏感知中继选择方案。我们的数值结果表明，我们提出的计划的主要和次要系统的收益。

MIMO Pinching-Antenna辅助SWIPT

MIMO Pinching-Antenna-Aided SWIPT

提出PASS辅助MIMO SWIPT系统，联合优化pinching波束成形与PA位置，在满足EHR能量约束下最大化IDR和速率，并用WMMSE与Gauss-Seidel交替算法验证其性能优势。

能量有效的无线信息和功率传输系统的多目标功率分配

Multi-Objective Power Allocation for Energy Efficient Wireless Information and Power Transfer Systems

同时无线信息和功率传输（SWIPT）为实现永久无线网络提供了有前途的解决方案。能量效率是衡量系统性能的重要指标，本文研究SWIPT系统中能量有效的资源分配算法设计。我们首先调查之间的权衡EE的信息传输，EE的功率传输，并在一个基本的SWIPT系统与分离的接收器的总发射功率。在最大发射功率约束下，建立了多目标优化问题。我们提出了一种算法，实现灵活的资源分配的能量效率最大化和发射功率最小化。在仿真结果中示出了系统设计目标的折衷区域。此外，我们考虑在SWIPT系统与功率分配接收机的安全通信。人工噪声被注入到通信信道中，以对抗潜在窃听者的窃听能力。当系统中存在多个合法信息接收者和多天线潜在窃听者时，提出了一种功率有效的资源分配算法。仿真结果表明，显着的性能增益所提出的最佳算法相比，次优基线计划。

Active STAR-RIS辅助的SWIPT系统能效优化设计

Energy Efficient Design of Active STAR-RIS-Aided SWIPT Systems

本文研究active STAR-RIS辅助的SWIPT系统能效最大化问题，提出结合凸优化与强化学习的交替优化方案，联合优化波束成形与STAR-RIS参数，使系统平均性能比被动系统提升57%。

AN-aided Secure Transmission in Multi-user MIMO SWIPT Systems

In this paper, an energy harvesting scheme for a multi-user multiple-input-multiple-output (MIMO) secrecy channel with artificial noise (AN) transmission is investigated. Joint optimization of the transmit beamforming matrix, the AN covariance matrix, and the power splitting ratio is conducted to minimize the transmit power under the target secrecy rate, the total transmit power, and the harvested energy constraints. The original problem is shown to be non-convex, which is tackled by a two-layer decomposition approach. The inner layer problem is solved through semi-definite relaxation, and the…

STAR-RIS辅助的SWIPT系统的鲁棒资源分配

Robust Resource Allocation for STAR-RIS Assisted SWIPT Systems

本文研究不完美CSI下STAR-RIS辅助SWIPT系统的鲁棒资源分配，采用MOOP框架并通过ε-约束和S-procedure转化问题，提出基于AO的算法联合设计波束成形，数值结果表明STAR-RIS及TS协议在性能和鲁棒性上具显著优势。

Joint Tx Power Allocation and Rx Power Splitting for SWIPT System with Multiple Nonlinear Energy Harvesting Circuits

We study the joint transmit (Tx) power allocation and receive (Rx) power splitting for simultaneous wireless information and power transfer (SWIPT). Considering the practical scenario of nonlinear energy harvesting (EH), we adopt the realistic nonlinear EH model for analysis. To address the critical nonlinearity issue due to the saturation, we propose to use multiple EH circuits in parallel. An important problem is to maximize the achievable rate by jointly optimizing Tx power allocation and Rx power splitting, which is a nonconvex problem. In this paper, we first derive the optimal solution f…