A decision-aided strategy for enhancing transmissions in wireless OSTBC-based systems

Authors:
Tiago M. Fernández-Caramés;Adriana Dapena;José A. García-Naya;Miguel González-López
Affiliations:
Departamento de Electrónica e Sistemas, Universidade da Coruña, A Coruña, Spain;Departamento de Electrónica e Sistemas, Universidade da Coruña, A Coruña, Spain;Departamento de Electrónica e Sistemas, Universidade da Coruña, A Coruña, Spain;Departamento de Electrónica e Sistemas, Universidade da Coruña, A Coruña, Spain
Venue:
IWANN'11 Proceedings of the 11th international conference on Artificial neural networks conference on Advances in computational intelligence - Volume Part II
Year:
2011

Citing 7
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Abstract

Orthogonal Space-Time Block Coding (OSTBC) allows multiple antenna wireless systems to exploit spatial and temporal diversity. When transmitting multimedia content, OSTBC-based system's performance can be greatly enhanced through the optimization of different parameters. For instance, data rates can be improved if the overhead related to sending side information (pilot symbols) is minimized. Also, processing speed can be increased if the decoding algorithms computational load is reduced. In this paper, it is presented a decision-aided channel estimation method aimed specifically at addressing the aforementioned two issues: the method incorporates unsupervised strategies to estimate the channel without using pilot symbols and a simple decision rule to determine if channel estimation is required for each frame, what allows transceiver designers to implement techniques to avoid channel estimation.