Signal Processing and Communications Group

Cooperative transmission for broadband wireless communications systems

 

Acronym:    ECO
Code:    TEC2004-04526
Funder:    Spanish Government
Start date:    2005 January 1st
End date:    2007 December 31st
Web site:    http://gps-tsc.upc.es/comm2/eco/index.html

SPCOM Participants:    Adrian Agustin de Dios, Juan Fernández Rubio, Luis García Ordóñez, Josemanuel Huerta Guillén, Maribel Madueño Ruiz, Olga Muñoz Medina, Jaume Riba Sagarra, Josep Sala Alvarez, Josep Vidal Manzano and Javier Villares Piera
SPCOM Responsible:    Josep Vidal Manzano

Summary

The design of future wireless communications systems delivering high bitrates is currently being planned through the use of ever increasing carrier frequencies and larger bandwidths. At these frequencies, the path loss is more important than for the second generation systems and, as a consequence, an effective geographic coverage implies a higher density of base stations (or access points) and an increased cost of the infrastructure. Density increase will consequently lead to an increase of the offered bandwidht per square km which most likely will not be utilized according to the expected demands. In this situation, the operators are incurring a high risk.

To remedy this situation it is necessary to design new transmission schemes able to overcome the tradeoff between coverage and bitrate. The schemes proposed in this project are able to achieve this by dropping the paradigm of communication between two players (transmitter and receiver) just by introducing one (or many) third players that cooperate with the transmitter and acts as relay. This cooperative transmission principle builds in practice a virtual array of antennas (MIMO) yielding, not only the known benefits in terms of capacity - coverage (or both), but also macrodiversity and hence robusteness to shadowing.

Journal publications

[1] A. Agustin de Dios and J. Vidal, "Amplify-and-forward cooperation under interference-limited spatial reuse of the relay slot", IEEE Transactions on Wireless Communications, Vol. 5, May 2008, pp. 1952 - 1962.

[2] O. Muñoz Medina, J. Vidal and A. Agustin de Dios, "Linear transceiver design in non regenarative relays with channel state information", IEEE Transactions on Signal Processing, Vol. 55, June 2007, pp. 2593 - 2604.

[3] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Hybrid Turbo FEC/ARQ Systems and Distributed Space-Time Coding for Cooperative Transmission", International Journal of Wireless Information Networks, Vol. 12, December 2005, pp. 263 - 280.

[4] F. Rey Micolau, M. Lamarca and G. Vázquez, "Robust power allocation algorithms for MIMO OFDM systems with imperfect CSI", IEEE Transactions on Signal Processing, Vol. 53, No. 2, March 2005, pp. 1070 - 1085.

[5] E. Calvo Page and J. Ribot, "Introducción a los códigos turbo", IEEE Buran, December 2003.

Conference publications

[1] 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.

[2] 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.

[3] 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.

[4] 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.

[5] 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.

[6] O. Muñoz Medina, J. Vidal, A. Agustin de Dios and E. Calvo Page, "Resource Management for Relay Enhanced WiMAX: OFDM and OFDMA", Workshop Trends in Radio Resource Management, November 2007.

[7] A. Agustin de Dios and J. Vidal, "High Spectral Efficiency of Multiple-relays Assited Amplify-and-Forward Cooperative Transmissions under Spatial Reuse", IEEE Vehicular Technology Conference Fall, September 2007.

[8] A. Agustin de Dios and J. Vidal, "Radio resources optimization for the relay-assisted multiple access gaussian channel", IEEE International Workshop on Signal Processing Advances for Wireless Communications, June 2007.

[9] S. Valentin, H. S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal, A. Agustin de Dios and I. Aad, "Cooperative Wireless Networking beyond Store-and-Forward: Perspectives for PHY and MAC Design", Wireless World Research Forum Workshop, November 2006.

[10] P. Closas Gómez, C. Fernandez Prades and J. Fernández Rubio, "Sequential Monte-Carlo approximation to the ML Time-delay Estimator in a Multipath Channel", IEEE International Workshop on Signal Processing Advances for Wireless Communications, July 2006.

[11] M. Lamarca, H. Lou and J. Garcia-Frias, "Capacity Approaching Layered MIMO Schemes for Quasi-Static Fading Channels", IEEE International Workshop on Signal Processing Advances for Wireless Communications, July 2006, pp. 1 - 5.

[12] P. Closas Gómez, C. Fernandez Prades and J. Fernández Rubio, "Bayesian DLL for Multipath Mitigation in Navigation Systems using Particle Filters", IEEE International Conference on Acoustics, Speech and Signal Processing, May 2006.

[13] A. Agustin de Dios and J. Vidal, "TDMA COOPERATION USING SPATIAL REUSE OF THE RELAY SLOT WITH INTERFERING POWER DISTRIBUTION INFORMATION", IEEE International Conference on Acoustics, Speech and Signal Processing, May 2006.

[14] O. Lahuerta and M. Lamarca, "Joint design of code, constellation and power allocation in BICM LDPC coded systems", IEEE International Symposium on Turbo Codes and Related Topics, April 2006.

[15] M. Lamarca, H. Lou, O. Lahuerta and J. Garcia-Frias, "MIMO transmission schemes in block fading using multilevel codes with multistage decoding", IEEE International Symposium on Turbo Codes and Related Topics, April 2006.

[16] L. G. Ordóñez, A. Pagès Zamora and J. R. Fonollosa, "Diversity and Multiplexing Tradeoff of Multiple Beamforming in MIMO Channels", IEEE International Symposium on Information Theory, September 2005, pp. 1 - 5.

[17] C. Fernandez Prades, P. Closas Gómez and J. Fernández Rubio, "Advanced Signal Processing Techniques in Local User Terminals for Search and Rescue Systems Based on MEO Satellites", Institute of Navigation Satellite Division Technical Meeting, September 2005.

[18] A. Agustin de Dios, J. Vidal and O. Muñoz Medina, "Multi-User Diversity in the Cooperative Transmissions", IST Summit on Mobile and Wireless Communications, June 2005.

[19] L. G. Ordóñez, D. P. Palomar, A. Pagès Zamora and J. R. Fonollosa, "Analytical BER Performance in Spatial Multiplexing MIMO Systems", IEEE International Workshop on Signal Processing Advances for Wireless Communications, June 2005, pp. 1 - 5.

[20] M. Lamarca and F. Rey Micolau, "Indicators for PER prediction in wireless systems: A comparative study", IEEE Vehicular Technology Conference Spring, Vol. 2, June 2005, pp. 792 - 796.


[21] M. Lamarca and H. Lou, "Spectrally efficient MIMO transmission schemes based on multilevel codes", IEEE International Workshop on Signal Processing Advances for Wireless Communications, June 2005, pp. 1083 - 1087.

[22] O. Muñoz Medina, J. Vidal and A. Agustin de Dios, "Non-Regenerative MIMO Relaying with channel state information", IEEE International Conference on Acoustics, Speech and Signal Processing, March 2005.

Books

[1] S. Valentin, H. S. Lichte, H. Karl, G. Vivier, S. Simoens, J. Vidal and A. Agustin de Dios, "Implementing Cooperative Wireless Networks. Towards Feasibility and deployment. Chapter 8: Cognitive Wireless Networks, Concepts, Methodologies and Visions inspiring the age of enlightment of wireless communications", Springer, September 2007.