On the Performance of OFDM-Based Amplify-and-Forward Relay Networks in the Presence of Phase Noise

We investigate the performance of orthogonal frequency division multiplexing (OFDM)-based dual-hop amplify-and-forward (AF) relay networks in the presence of phase noise (PHN). We show that the use of an AF relay may not be beneficial compared to a direct transmission in the presence of PHN. Using o...

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Bibliographic Details
Published in:IEEE transactions on communications 2011-05, Vol.59 (5), p.1458-1466
Main Authors: Rabiei, Payam, Won Namgoong, Al-Dhahir, Naofal
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Amplification
Amplify and forwards relay
Applied sciences
Audio frequencies
Channel estimation
Channels
Detection, estimation, filtering, equalization, prediction
Estimators
Exact sciences and technology
Frequency domain analysis
Information, signal and communications theory
Interference
Multiplexing
Noise
OFDM
Orthogonal Frequency Division Multiplexing
phase noise
Protocols
Relay
Relay networks
Relays
Signal and communications theory
Signal to noise ratio
Signal, noise
Studies
Symbols
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Transmission and modulation (techniques and equipments)
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Summary:We investigate the performance of orthogonal frequency division multiplexing (OFDM)-based dual-hop amplify-and-forward (AF) relay networks in the presence of phase noise (PHN). We show that the use of an AF relay may not be beneficial compared to a direct transmission in the presence of PHN. Using outage probability analysis, an upper bound on the allowable PHN level is derived which ensures that the dual-hop outperforms the direct transmission. To improve dual-hop transmission performance in the presence of PHN, we propose a reduced-complexity joint channel and PHN estimator using full-pilot OFDM symbols for AF relay transmission. The proposed approach achieves a lower mean squared error compared to the conventional channel estimator. In addition, we derive a joint data detection and PHN estimation scheme for comb-type data OFDM symbols by modifying the maximum ratio combining metric to account for the effect of PHN at the destination node.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2011.030411.100206