Sparse Bayesian Learning (SBL) Based Channel Estimation for Millimeter-Wave Hybrid Massive MIMO System
Keywords:
Millimeter-wave (mmWave), Sparse Bayesian Learning (SBL), Channel estimation, Massive MIMO, Sparse ChannelAbstract
Reduced system complexity yields advantages that extend to enforcement obligations as well. The task of acquiring precise channel information for hybrid precoding in millimeter-wave (mmWave) systems is challenging for a multitude of reasons. Among the methods employed are analog precoding, a large number of antennas, and a pre-beamforming state with a low signal-to-noise ratio. To address this issue, an innovative channel estimation method is necessary. A massive MIMO channel estimation technique is suggested by the authors for hybrid millimeter-wave wireless networks. This scheme utilizes SBL and capitalizes on the spatial sparsity of wireless channels resulting from focused propagation. Spherical sparsity and response matrices for quantized directional cosines at the transmitting and receiving antenna arrays are distinctive characteristics of the enormous MIMO channel. A Sparse Bayesian Learning (SBL) channel estimation method utilizing Expectation Maximization (EM) is engineered. Using the NYUSIM millimeter channel simulator, the actual mmWave channel model is estimated so that the submitted techniques can be validated. In comparison to least-squares and orthogonal matching pursuit (OMP) techniques, SBL-based approaches for channel estimation demonstrate superior performance, as demonstrated by the simulation outcomes.
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