Ultra-low latency communication serves a pillar technology of 5G mobile communications and still requires breakthroughs to successfully facilitate. Very recent efforts to integrate virtual cell with open-loop wireless transmission, proactive network association, and anticipatory mobility management suggests a fundamentally new approach to achieve ultra-low latency vehicular networking. However, realistic multiple access in this configuration is very much wanted, particularly in the downlink. Using beam-forming or interference alignment to suppress inter-cell interference is not suitable for this scenario because channel state information (CSI) feedback is disadvantageous to ultra-low latency applications. Multiuser detection (MUD) is suggested to deal with downlink interference. A major concern in MUD is computational complexity especially for high-order modulation. Exploiting the characteristic of downlink transmission, we happily note the tradeoff between bit error rate (BER) performance and detection complexity to practically develop low-complexity MUD in the downlink receiver. Applying sphere decoding realizes further reliability and even lower latency in the downlink.
Low Complexity Multiuser Detection in the Downlink of Ultra-Low Latency Virtual-Cell Based Vehicular Networks
2018-08-01
869345 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Downlink Capacity of Vehicular Networks with Access Infrastructure
Springer Verlag | 2013
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