2014/06/18 by Giuseppe Cocco, Cocco, Giuseppe, Stephan Pfletschinger +3
Computer Science · Engineering · #Advanced Wireless Communication Technologies #Cooperative Communication and Network Coding #FOS: Computer and information sciences #Information Theory (cs.IT) #Networking and Internet Architecture (cs.NI) #Wireless Communication Security Techniques
paper · pdf · doi:10.48550/arxiv.1406.4736
openalex publication_date 2014/06/18 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
We present a novel cross layer approach to random access (RA) that combines\nphysical-layer network coding (PLNC) with multiuser detection (MUD). PLNC and\nMUD are applied jointly at the physical level in order to extract any linear\ncombination of messages experiencing a collision. The set of combinations\nextracted from a whole frame is then processed by the receiver to recover the\noriginal packets. A simple pre-coding stage at the transmitting terminals\nallows the receiver to further increase system diversity. We derive an\nanalytical bound on the system throughput and present simulation results for\nthe decoding at the physical level as well as several performance measures at\nframe level in block fading channels, namely throughput, packet loss rate and\nenergy efficiency. The results we present are promising and suggest that a\ncross layer approach leveraging on the joint use of PLNC and MUD can\nsignificantly improve the performance of RA systems.\n