Signal Processing Techniques for 5G: An Overview

[Abstract] This paper gives an outline of the algorithms and implementation of the main signal processing techniques being developed for 5G wireless communication. The first part contains a review and comparison of six orthogonal and non⁃orthogonal waveform⁃generation and modulation schemes: generalized frequency⁃division multiplexing (GFDM), filter⁃bank multicarrier (FBMC), universal filtered multicarrier (UFMC), bi⁃orthogonal frequency⁃division multiplexing (BFDM), sparse⁃code multiple⁃access (SCMA), and non⁃orthogonal multiple access (NOMA). The second part discusses spatial signal processing algorithms and implementations for massive multiple⁃input multiple⁃output (massive⁃MIMO), 3D beamforming and diversity, and orbital angular momentum (OAM) based multiplexing. The last part gives an overview of signal processing aspects of other emerging techniques in 5G, such as millimeter⁃wave, cloud radio access networks, full duplex mode, and digital radio⁃frequency processing.

[Keywords] 3D beamforming 5G; massive MIMO; GFDM and spatial multiplexing