Reconfigurable OFDMA-based Cooperative NetworKs Enabled by Agile SpecTrum Use

Acronym:    ROCKET
Funder:    European Commission
Start date:    2008 January 1st
End date:    2009 December 31st
Keywords:    OFDMA, Multihop communications, Cooperative transmission, Radio resource management, WiMax, Conigitive radios, Agile spectrum usage
Web site:    http://www.ict-rocket.eu

Partners:    CEA-LETI, Czech Technical University, Dune S.R.L., IBER WIFI EXCHANGE, INTRACOM S.A., Motorola, RWTH Aachen University and UNIS
SPCOM Participants:    Josep Vidal Manzano
SPCOM Responsible:    Josep Vidal Manzano

Summary

The project aims at providing a ubiquitous wireless solution to reach bit rates higher than 100Mbps with peak throughputs higher than 1Gbps, based on Reconfigurable OFDMA Cooperative Networks enabled by agile spectrum use (ROCKET). While increasing peak rates is a natural must-do for new standards, we believe in ROCKET that providing homogeneous high rate coverage is equally important as it guarantees a constant user experience over the whole served area and is the key enabler to a higher average spectral efficiency of the system. Those goals are inline with the IMT-Advanced requirements described in [ITU-R M1645] and match the requirements of the IEEE 802.16 Task Group m (TGm) for Advanced Air Interface. In order to guarantee a strong focus and efficiency in the project, we propose to limit the scope of our investigations to two questions which we believe will be at the centre of future IMT-advanced system design:

1) How can we increase the bandwidth and make the whole system benefit from it?

2) How can we increase system spectral efficiency and provide ubiquitous high-rate coverage?

Those questions are addressed by devising methods for improved spectrum usage, advanced multi-user cooperative transmission and ultra-efficient MAC design. Providing inputs to standardization bodies, generating IPR and conceiving architectures for some of the algorithms on a hardware platform are the ways the project plans to have actual impact.

Journal publications

[1] A. Moral, J. Vidal, J. Pérez, A. Agustin de Dios, N. Marina and A. Host-Madsen, "Techno-economic evaluation of cooperative relaying transmission techniques in OFDM cellular networks", EURASIP Journal on Advances in Signal Processing, Special Issue on Cooperative MIMO Multicell Networks, Vol. 2011, February 2011, pp. 1 - 23.

[2] S. Simoens, O. Muñoz Medina, J. Vidal and Aitor del Coso, "On Compress-and-Forward Cooperative Relaying in MIMO Systems", IEEE Transactions on Signal Processing, Vol. 58, No. 2, February 2010, pp. 781 - 791.

[3] S. Simoens, O. Muñoz Medina, J. Vidal and Aitor del Coso, "On the Gaussian MIMO Relay Channel with Full Channel State Information", IEEE Transactions on Signal Processing, Vol. 57, No. 9, September 2009, pp. 3588 - 3599.

[4] E. Calvo Page, J. Vidal and J. R. Fonollosa, "Optimal Resource Allocation in Relay-Assisted Cellular Networks With Partial CSI", IEEE Transactions on Signal Processing, Vol. 57, No. 7, July 2009, pp. 2809 - 2823.

Conference publications

[1] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Performance of downlink schedulers with superposed or orthogonal transmissions", IEEE International Conference on Communications, May 2010, pp. 1 - 5.

[2] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Protocols and resource allocation for the two-way relay channel with half-duplex terminals", IEEE International Conference on Communications, June 2009.

[3] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Adaptive bitrate and resource allocation for relay-assisted ARQ transmissions", IEEE International Conference on Communications, June 2009.

[4] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Analytical Resource Optimization for the DF Relay-assisted Transmission under HARQ", IEEE Vehicular Technology Conference Spring, April 2009.

[5] O. Muñoz Medina, E. Calvo Page, J. Vidal and A. Agustin de Dios, "Downlink Multi-Cell Radio Resource Management for Coordinated Base Stations", IEEE Vehicular Technology Conference Spring, April 2009.

[6] A. Agustin de Dios and J. Vidal, "Resource optimization in decode-and-forward half-duplex multiple relay-assisted channel", IEEE International Workshop on Signal Processing Advances for Wireless Communications, July 2008.

[7] M. Shen, A. Host-Madsen and J. Vidal, "An Improved Interference Alignment Scheme for Frequency Selective Channels", IEEE International Symposium on Information Theory, July 2008, pp. 559 - 563.

[8] S. Simoens, O. Muñoz Medina, J. Vidal and Aitor del Coso, "Capacity Bounds for Gaussian MIMO Relay Channel with Channel State Information", IEEE International Workshop on Signal Processing Advances for Wireless Communications, July 2008, pp. 441 - 445.

[9] N. Marina, J. Vidal and A. Host-Madsen, "Dimensioning Cellular Networks with Fixed Relay Stations", IEEE International Conference on Telecommunications, June 2008, pp. 1 - 5.

[10] O. Muñoz Medina, J. Vidal, A. Agustin de Dios, E. Calvo Page and A. Alcón, "Enhancing 802.16 networks through infrastructure-based relays", ICT Summit on Mobile and Wireless Communications, June 2008.

[11] S. Simoens, J. Vidal and O. Muñoz Medina, "Compress-and-Forward Cooperative Relaying in MIMO-OFDM Systems", IEEE International Workshop on Signal Processing Advances for Wireless Communications, July 2006.

[12] , "Performance of downlink schedulers with superposed or orthogonal transmissions", IEEE International Conference on Communications, .

[13] , "Performance of downlink schedulers with superposed or orthogonal transmissions", IEEE International Conference on Communications, .

Books

[1] O. Muñoz Medina, J. Vidal, E. Calvo Page and A. Agustin de Dios, "Radio Resource Management in WiMAX. RRM strategies in multihop and cooperative transmission", John Wiley & Sons, July 2009, pp. 315 - 368. x

[2] O. Muñoz Medina, J. Vidal, A. Agustin de Dios, S. Simoens, E. Calvo Page, R. Hoshyar and Y. Liu, "Radio Resource Management in WiMAX. Relaying techniques for OFDM-MIMO systems", John Wiley & Sons, July 2009, pp. 271 - 314.