An iterative pilot-data-aided estimator for SFBC relay-assisted OFDM-based systems

Darlene Neves, Carlos Ribeiro, Adão Silva, Atílio Gameiro
2012 EURASIP Journal on Advances in Signal Processing  
In this article, we propose and assess an iterative pilot-data-aided channel estimation scheme for space frequency block coding relay-assisted OFDM-based systems. The relay node (RN) employs the equalise-and-forward protocol, and both the base station (BS) and the RN are equipped with antenna arrays, whereas the user terminal (UT) is a single-antenna device. The channel estimation method uses the information carried by pilots and data to improve the estimate of the equivalent channels for the
more » ... th BS-RN-UT. The mean minimum square error criterion is used in the design of the estimator for both the pilot-based and data-aided iterations. In different scenarios, with only one data iteration, the results show that the proposed scheme requires only half of the pilot density to achieve the same performance of non-data-aided schemes.
doi:10.1186/1687-6180-2012-74 fatcat:m5wyjxgvv5gyldofilu245gtqy