In this work, based on the hybrid generalized approximate message passing (HyGAMP) algorithm, we propose the message-scheduling GAMP (MSGAMP) algorithm in order to address the problem of joint active device detection and channel estimation in an uplink grant-free massive MIMO system scenario. In MSGAMP, we apply three different scheduling techniques based on the Residual Belief Propagation (RBP) in which messages are generated using the latest available information. With a much lower computational cost than the state-of-the-art algorithms, MSGAMP-type schemes exhibits good performance in terms of activity error rate and normalized mean squared error, requiring a small number of iterations for convergence. %

翻译：在这项工作中,根据混合通用信息传递(HyGAMP)算法,我们建议采用信息排期GAMMP(MSGAMP)算法,以便解决联合使用主动设备探测和频道估算的问题,在大规模不附带赠款的大规模MIMO系统假设中,我们采用基于残余信仰传播(RBP)的三种不同的列表技术,其中信息是利用现有最新信息生成的。由于计算成本大大低于最先进的算法,MSGAMP(MSGAMP)类型的计划在活动误差率和正常平均正方差方面表现良好,需要少量的迭代才能趋同。%