Low-Complexity QRD-M with Path Eliminations in MIMO-OFDM Systems
AbstractThe QR decomposition-M algorithm (QRD-M) is a popular signal detector which has similar error performance with maximum likelihood (ML) in multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems. The QRD-M uses M candidates at each layer, unlike the ML. However, the complexity of the QRD-M is high in huge MIMO-OFDM systems due to unnecessary survival paths at each layer. In this paper, a low-complexity QRD-M with variable number of survival paths at each layer is proposed. In the conventional QRD-M, path eliminations at the previous layer reduce the number of calculations for accumulated squared Euclidean distance (ASED) in subsequent layers. The proposed QRD-M eliminates unnecessary survival paths by comparing the ASED and the calculated threshold at each layer. The simulation results show that the proposed QRD-M maintains the error performance for the conventional QRD-M and has a very low complexity. View Full-Text
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Ro, J.-H.; Kim, J.-K.; You, Y.-H.; Song, H.-K. Low-Complexity QRD-M with Path Eliminations in MIMO-OFDM Systems. Appl. Sci. 2017, 7, 1206.
Ro J-H, Kim J-K, You Y-H, Song H-K. Low-Complexity QRD-M with Path Eliminations in MIMO-OFDM Systems. Applied Sciences. 2017; 7(12):1206.Chicago/Turabian Style
Ro, Jae-Hyun; Kim, Jong-Kwang; You, Young-Hwan; Song, Hyoung-Kyu. 2017. "Low-Complexity QRD-M with Path Eliminations in MIMO-OFDM Systems." Appl. Sci. 7, no. 12: 1206.
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