Title :
The optimum signal perturbation free transmit scheme to enhance the channel estimation of MIMO-OFDM system
Author :
Jeyanthi, R. ; Malmurugan, N.
Abstract :
There are many algorithms to improve the channel estimation of MIMO-OFDM system based on blind, semi blind and training methods. But still, it can be improved. Signal perturbation free transmit scheme is one of such schemes to improve it. This scheme transmits the data which bears the partial information of the correlation matrix of the transmitted signal to the receiver in order to cancel the signal perturbation error. In this paper, optimum signal perturbation free (SPF) transmit scheme which enhances channel estimation of frequency selective channel of MIMO-OFDM system is presented. The performance of SPF assisted semi blind channel estimation is enhanced in this work by the selection of a circularly shifted orthogonal pilot sequences on different antennas. The linear prediction based SPF transmit scheme with optimum pilot sequences known as optimum SPF transmit scheme outperform the performance of SPF scheme with orthogonal pilot sequences.
Keywords :
MIMO communication; OFDM modulation; channel estimation; correlation methods; data communication; linear predictive coding; wireless channels; MIMO-OFDM system; SPF assisted semiblind channel estimation enhancement; blind training method; circularly shifted orthogonal pilot sequence; correlation matrix; data transmission; frequency selective channel; optimum linear prediction based SPF transmit scheme; optimum pilot sequence; optimum signal perturbation free transmit scheme; semiblind training method; signal perturbation error; Channel estimation; MIMO; OFDM; Wireless communication; MIMO-OFDM system; channel estimation; linear prediction; optimum pilot sequence; signal perturbation free (SPF);
Conference_Titel :
Devices, Circuits and Systems (ICDCS), 2012 International Conference on
Conference_Location :
Coimbatore
Print_ISBN :
978-1-4577-1545-7
DOI :
10.1109/ICDCSyst.2012.6188787
