Title :
A low-cost non-coherent transmission for uncoded two-way relay channels
Author :
Krikidis, Ioannis ; Ding, Zhiguo ; Charalambous, Charalambos D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Cyprus, Nicosia, Cyprus
Abstract :
In this paper, we investigate a two-phase two-way relay protocol for a scenario without channel coding or channel estimation. The considered configuration represents practical sensor networks, where the nodes wish to exchange some low rate messages (e.g. 1 bit) via a shared relay under a strict complexity or latency constraint (corresponding to our assumptions of no-coding and no-channel estimation). A new scheme which incorporates a single-threshold non-coherent energy detection and a digital network coding process at the relay node is proposed. The energy detection is optimized for both phases of the protocol and a threshold that exhibits no error floors is derived in a closed form. Numerical results validate the efficiency of the proposed scheme and introduce the two-way relay channel as an efficient structure also for non-coherent and uncoded systems.
Keywords :
network coding; protocols; signal detection; wireless channels; wireless sensor networks; digital network coding process; latency constraint; low cost noncoherent transmission; low rate messages; sensor network; shared relay; single threshold noncoherent energy detection; strict complexity; two phase two way relay protocol; uncoded two way relay channels; Broadband antennas; Broadband communication; Mobile communication; Network coding; Protocols; Relays; Wireless communication; Cooperative networks; non-coherent detection; two-way relay channel; uncoded;
Conference_Titel :
GLOBECOM Workshops (GC Wkshps), 2011 IEEE
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4673-0039-1
Electronic_ISBN :
978-1-4673-0038-4
DOI :
10.1109/GLOCOMW.2011.6162431
