This letter investigates computation offloading and transmit precoding co-design for multi-access edge computing (MEC), where multiple MEC users (MUs) equipped with multiple antennas access the MEC server in a non-orthogonal multiple access manner. We aim to minimize the total energy consumption of all MUs while satisfying the latency constraints by jointly optimizing the computational frequency, offloading ratio, and precoding matrix of each MU. For tractability, we first decompose the original problem into three subproblems and then solve these subproblems iteratively until convergence. Simulation results validate the convergence of the proposed method and demonstrate its superiority over baseline algorithms.

翻译：本文研究多接入边缘计算（MEC）中计算卸载与发射预编码的协同设计，其中配备多天线的多个MEC用户（MU）以非正交多址方式接入MEC服务器。我们旨在通过联合优化每个MU的计算频率、卸载比例和预编码矩阵，在满足时延约束的同时最小化所有MU的总能耗。为便于处理，我们首先将原问题分解为三个子问题，然后迭代求解直至收敛。仿真结果验证了所提方法的收敛性，并展示了其相较于基线算法的优越性。