Abstract
Relay-assisted cooperative communications are a promising solution for error-performance improvement and cell coverage extension. However, additional resources such as time slots or frequency bands are required for the relay, which reduce the overall throughput. This paper proposes two cooperative relay schemes that employ hierarchical modulation to overcome this limitation. One scheme is for symmetric downlink communications and the other is for asymmetric downlink communications. These schemes exploit the hierarchical modulation symbols for users in the network and allow the system to transmit two or more independent data streams simultaneously. The proposed schemes reduce the number of transmission phases to the same as conventional schemes without diversity gain. The symbol-error rates of the proposed systems are a function of the distance parameter of hierarchical modulation. By flexibly controlling the distance parameter based on specific scenarios, it allows an extra degree of freedom to guarantee error performance of receivers whose signals undergo different losses.
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References
Sendonaris A., Erkip E., Aazhang B. (2003) User cooperation diversity—Part I: System description. IEEE Transactions on Communications 51(11): 1927–1938
Sendonaris A., Erkip E., Aazhang B. (2003) User cooperation diversity Part II: Implementation aspects and performance analysis. IEEE Transactions on Communications 51(11): 1939–1948
Boyer J., Falconer D. D., Yanikomeroglu H. (2004) Multihop diversity in wireless relaying channels. IEEE Transactions on Communications 52(10): 1820–1830
Nosratinia A., Hunter T., Hedayat A. (2004) Cooperative communication in wireless networks. IEEE Communications Magazine 42: 74–80
Laneman J. N., Tse D. N. C., Wornell G. W. (2004) Cooperative diversity in wireless networks: Efficient protocols and outage behavior. IEEE Transactions on Information Theory 50(12): 3062–3080
Larsson E. G., Vojcic B. R. (2005) Cooperative transmit diversity based on superposition modulation. IEEE Communications Letters 9(9): 778–780
Lee K., Cho D. (2007) Hierarchical constellation based adpative relay scheme in multi-hop networks. IEEE Communications Letters 11(3): 225–227
Hausl C., Hagenauer J. (2007) Relay communication with hierarchical modulation. IEEE Communications Letters 11: 64–66
Lee, S. Y., & Whang, K. C. (Sep. 2008). A collaborative cooperation scheme using hierarchical modulation. InProceeding of IEEE VTC’08-Fall.
Chang M., Lee S. (2009) Performance analysis of cooperative communication system with hierarchical modulation over Rayleigh fading channel. IEEE Transaction on Wireless Communications 8: 2848–2852
Popovski, P., & de Carvalho, E. (Apr. 2007). Spectrally-efficient wireless relaying based on superposition coding. InProceeding of IEEE 65th VTC07-Spring, pp. 2936–2940.
Popovski P., de Carvalho E. (2008) Improving the rates in wireless relay systems through superposition coding. IEEE Transaction on Wireless Communications 7(12): 4831–4836
Digital Video Broadcasting (DVB); Implementation guidelines for DVB terrestral services; Transmission aspects. ETSI Technical Report, TR 101 190, Dec. 1997.
Vitthaladevuni P. K., Alouini M. S. (2003) A recursive algorithm for the exact BER computation of generalized hierarchical QAM constellations. IEEE Transactions on Information Theory 49(1): 297–307
Morimoto, M., Okada, M., & Komaki, S. (Nov. 1995). A hierarchical image transmission system in a fading channel. InProceeding of IEEE ICUPC, pp. 769–772.
Cover T. M., Gamal A. E. (1991) Element of information theory. Wiley, New York
Cover T. M. (1972) Broadcast channels. IEEE Transactions on Information Theory 18: 2–14
Cover T. M. (1998) Comments on broadcast channels. IEEE Transactions on Information Theory 44: 2524–2530
Whang, R. J., Liu, H., & Hong, E.-K. (May 2010). Multiuser cooperative relay communication employing hierarchical modulation. InProceeding of IEEE VTC’10-Spring.
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School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, 97331-3211, USA
Roderick Jaehoon Whang & Huaping Liu
Department of Electronics and Computer Engineering, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Korea
Saransh Malik & Intae Hwang
- Roderick Jaehoon Whang
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- Saransh Malik
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- Intae Hwang
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- Huaping Liu
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Correspondence toIntae Hwang.
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Whang, R.J., Malik, S., Hwang, I.et al. Cooperative Multiuser Relay Communications Employing Hierarchical Modulation.Wireless Pers Commun69, 1463–1479 (2013). https://doi.org/10.1007/s11277-012-0645-z
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