SNR Threshold-Based Relay Association and Random Phase Rotation for Cooperative Communicationopen access
- Authors
- Joung, J.; Park, S.; Oh, J.; Jeong, E.
- Issue Date
- Mar-2023
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- Cooperative communication; Cooperative communications; Cooperative systems; decode-and-forward relays; Fading channels; frame structure design; Half-duplex system; phase rotation; Relays; Signal to noise ratio; Symbols
- Citation
- IEEE Access, v.11, pp 24794 - 24807
- Pages
- 14
- Journal Title
- IEEE Access
- Volume
- 11
- Start Page
- 24794
- End Page
- 24807
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/67315
- DOI
- 10.1109/ACCESS.2023.3253680
- ISSN
- 2169-3536
- Abstract
- In this study, a cooperative communication system that employs multiple decode-and-forward relay nodes (RNs), in which the associated/active RNs perform phase rotation of the regenerated signals before retransmitting them to a destination node (DN), is examined. In the first phase, i.e., communication from a source node to RNs, a received signal-to-noise ratio (SNR) threshold-based RN association method is proposed. The optimal SNR thresholds are designed to maximize the bit-error-rate (BER) performance at the DN under various communication environments, such as modulation types and channel code rates. Furthermore, the number of phase rotations (PRs) in a frame is examined. Intensive numerical results show that more PRs in a frame provide better BER performance at the DN, irrespective of the communication environments. This study provides a valuable guideline for designing practical cooperative networks with multiple decode-and-forward RNs with PRs.
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