Performance of Hybrid ARQ for NDMA Access Schemes with Uniform Average Power Control
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| Title | Performance of Hybrid ARQ for NDMA Access Schemes with Uniform Average Power Control |
| Authors | |
| Abstract | Traditionally, a packet with errors, either due to channel noise or collisions, is discarded and needs to be retransmitted, leading to performance losses. Network Diversity Multiple Access (NDMA) handles collisions by combining a multipacket detection scheme with time diver- sity. In NDMA, the Base Station (BS) forces mobile terminals (MTs) to transmit P copies of each packet when P MTs collide. Diversity combining is limited to P copies of the packets, not allowing it to adapt to severe errors due to channel noise. This paper considers a multipacket detection scheme recently proposed, which reduces the Packet Error Rate (PER) when more than P packet copies are available. In this paper, a Hybrid-ARQ NDMA (H-NDMA) access mechanism is proposed. The access mechanism forces MTs with reception errors during a collision resolution epoch to transmit more than P times. Analytical models for Poisson traffic are proposed for the throughput and delay. The proposed system’s performance is evaluated for a Single-Carrier with Frequency Domain Equalization (SC- FDE) scheme, and compared to classical NDMA. H-NDMA parameter configuration is defined in terms of Quality of Service (QoS) requirements. |
| Publisher | ACADEMY PUBLISHER |
| Date | 2011-12-01 |
| Source | Journal of Communications Vol 6, No 9 (2011): Special Issue: Advances in Communications and Networking - I |
| Rights | Copyright © ACADEMY PUBLISHER - All Rights Reserved.To request permission, please check out URL: http://www.academypublisher.com/copyrightpermission.html. |