Maximizing the Spectral Efficiency of Amplify-and-Forward Relaying Systems over Nakagami-m Fading

In this paper, we propose and study a cooperative transmission scheme for amplify-and-forward (AF) relaying system with adaptive modulation. Unlike the conventional incremental relaying with adaptive modulation (IR-AM) scheme, which improves the spectral efficiency with the minimum usage of relaying...

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Bibliographic Details
Main Authors: Jae-Woo Kwon, Kyu-Sung Hwang, Young-Chai Ko, Hong-Chuan Yang
Format: Conference Proceeding
Language:English
Subjects:
Adaptive systems
Bit error rate
Modulation
Rayleigh channels
Relays
Signal to noise ratio
Online Access:Request full text
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Description
Summary:In this paper, we propose and study a cooperative transmission scheme for amplify-and-forward (AF) relaying system with adaptive modulation. Unlike the conventional incremental relaying with adaptive modulation (IR-AM) scheme, which improves the spectral efficiency with the minimum usage of relaying, our proposed scheme adaptively utilizes cooperative relaying to maximize the system spectral efficiency. We quantify the average spectral efficiency performance of the proposed scheme through statistical analysis and obtain the closed-form solutions for some practical scenarios of interest. Selected numerical results demonstrate that the spectral efficiency gain of the proposed scheme over the IR-AM scheme occurs mainly over the median signal-to-noise ratio range.
ISSN:1090-3038
2577-2465
DOI:10.1109/VETECF.2010.5594310