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The article discusses the problems of full-duplex communication systems. Such systems include analog and digital cancellation systems. This paper presents an overview of analog cancellations methods and experimental research of the analog and digital cancellation.
Sparse code multiple access is a new method for non-orthogonal multiplexing proposed in the framework of the 5G concept development. Noise immunity of this method depends directly on the codebooks. The article reviews the method of forming dynamically changing complex numbers of SCMA codebooks depending on the signal noise ratio. The method is based on… (More)