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Immersive Signage Transmission with Low-Complexity Detection Scheme

This paper proposes low-complexity detection scheme for immersive transmission in digital signage system based on multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM). For immersive signage transmission, a receiver of digital signage requires signal detection scheme with high reliability and low complexity. In this paper, low-complexity QR decomposition-M algorithm (QRD-M) is proposed. The proposed QRD-M calculates a threshold and eliminates unnecessary survival paths which have larger accumulated squared Euclidean distance (ASED) than a threshold. The simulation results show that the proposed QRD-M has the same error performance as conventional QRD-M. Also, the complexity of the QRD-M is very lower than the conventional QRD-M and it is decreased according to increased signal-to-noise ratio (SNR). An algorithm of the proposed QRD-M is used well in a receiver of small digital signage which requires high reliability and low complexity.