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The development of fifth-generation (5G) and beyond cellular networks has advanced significantly in recent years, offering a wide range of applications across various domains.A large number of antennas that can handle high data speeds, very low latency, and high connection density are required for the introduction of 5G technology.A promising way to achieve these rigorous requirements and construct 5G communication systems efficiently is to use millimeter-wave (mmWave) Massive Multi-Input Multi-Output (MIMO) technology.For messages to be transmitted and received successfully, it is imperative that the problems caused by millimeterwave propagation be resolved.This paper offers an extensive examination of the latest cutting-edge advancements in several channel estimate techniques designed specifically for millimeter-wave massive MIMO systems.In addition, the study compares and contrasts the solutions that have already been proposed in the literature, outlining their benefits and drawbacks.By doing this, the paper becomes a useful tool for researchers, providing information about the state of channel estimation algorithms for massive MIMO systems and outlining future research areas and problems.
Sowmeeya Sr (Sat,) studied this question.
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