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- W2275604316 abstract "Recently, random access (RA) protocols have acquired new interest from the scientific community not only in satellite communication scenarios but also due to the opening of new fields as smart grid and machine-to-machine (M2M) applications. Unslotted ALOHA-like RA protocols are very attractive for such applications thanks to the low complexity transmitters and to their complete avoidance of synchronization requirements. Evolutions of the ALOHA protocol employ time diversity through proactive replication of the packets but this diversity is n ot fully exploited at the receiver. The novel RA protocol named enhanced contention resolution ALOHA (ECRA) is presented, which goes beyond the limitation introducing combination techniques in the receiver algorithm. The behaviour of ECRA is investigated through mathematical analysis and simulations for two combination techniques, selection combining (SC) and maximal-ratio combining (MRC). Approximations of the packet error rate (PER) for unslotted RA protocols, including ECRA, well suited for the low channel load regime is also presented. Furthermore, ECRA and recently presented RA protocols, are analyzed in terms of different metrics, including spectral efficiency, showing that ECRA is able to l argely outperform both slotted and unslotted schemes." @default.
- W2275604316 created "2016-06-24" @default.
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- W2275604316 date "2016-02-24" @default.
- W2275604316 modified "2023-10-01" @default.
- W2275604316 title "Exploiting Combination Techniques in Random Access MAC Protocols: Enhanced Contention Resolution ALOHA" @default.
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