【摘要】 研究了由基站和用户组成的多载波无线携能通信系统,其上行链路和下行链路均采用正交频分复用技术。在下行链路中,基站同时向用户完成信息和能量的传输;在上行链路中,用户利用从基站接收的能量向基站回传信息。以最大化上下行链路加权和速率为目标,联合优化上下行链路的子载波分配和功率分配,提出了基于拉格朗日对偶法和椭球法的最优子载波与功率联合分配算法。实验仿真验证了所提算法的有效性。更多还原

【Abstract】 A multi-carrier simultaneous wireless information and power transfer(SWIPT) communication system including one base station(BS) and one user was investigated, where both uplink and downlink adopt orthogonal frequency division multiplexing(OFDM). In the downlink, the BS transmited information and power to the user simultaneously. In the uplink, the user transmited information to the BS by using the power harvested from the BS in the downlink. The weighted sum of the downlink and uplink achievable rates by jointly optimizing subcarrier allocation and power allocation of the uplink and downlink were aimed to maximized. An optimal algorithm to solve the joint resource allocation problem was proposed, which was based on the Lagrange duality method and the ellipsoid method. Finally, the result shows the performances of the proposed algorithm by computer simulations.更多还原