Diversity Analysis of Hierarchical Modulation in Wireless Relay Networks

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Diversity_Analysis_of_Hierarchical_Modulation_in_Wireless_Relay_Networks.pdf

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2014-07-01

Author

Yalcyn, Ahmet Zahid
Yüksel Turgut, Ayşe Melda

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In communication systems, hierarchical modulation is used to increase system robustness and to send different information flows simultaneously. However, when used in cooperative communication systems, hierarchical modulation is prone to error propagation, which is the most important problem that prevents the achievement of full diversity gains. Depending on the signal-to-noise ratio between the source and the relay, threshold digital relaying can be used to mitigate error propagation. Mitigating error propagation and achieving full diversity depend on setting the thresholds at the relay properly. In this paper, the first and second threshold values are determined so that full diversity gains are attained for both base and enhancement layer bits. Analytical and simulation results are provided to show that the threshold values must depend on the hierarchy parameter.

Subject Keywords

Cooperative communication, diversity, hierarchical modulation, relay networks, UNEQUAL ERROR PROTECTION, COOPERATIVE COMMUNICATION-SYSTEM, MULTILEVEL CODED MODULATION

URI

https://hdl.handle.net/11511/96563

Journal

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

DOI

https://doi.org/10.1109/tvt.2013.2294752

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Department of Electrical and Electronics Engineering, Article

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Citation Formats

A. Z. Yalcyn and A. M. Yüksel Turgut, “Diversity Analysis of Hierarchical Modulation in Wireless Relay Networks,” IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol. 63, no. 6, pp. 2989–2994, 2014, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96563.