TY - GEN
T1 - Theoretical analysis of decision directed block iterative channel estimation for OFDM mobile radio
AU - Adachi, Koichi
AU - Nakagawa, Masao
PY - 2006
Y1 - 2006
N2 - Orthogonal frequency division multiplexing (OFDM) is one of the promising transmission techniques for next generation mobile communication systems. Accurate channel estimation is essential for coherent OFDM signal transmissions. So far, many pilot-assisted channel estimation schemes have been proposed. In the case of packet transmission, channel estimation on the same received packet can be repeated many times using the decision feedback to improve the channel estimation accuracy, resulting in decision directed block iterative channel estimation (DD-BICE). However, decision feedback of erroneously detected data symbols degrades the resulting bit error rate (BER) performance. A 2-dimensional (2D) averaging filter can be used for reducing the impact of decision feedback errors. In this paper, a theoretical analysis is presented for DD-BICE taking into account the decision feedback errors assuming quadrature phase shift keying (QPSK) data modulation. The impact of 2D averaging filter is discussed and the validity of the theoretical analysis is confirmed by computer simulation.
AB - Orthogonal frequency division multiplexing (OFDM) is one of the promising transmission techniques for next generation mobile communication systems. Accurate channel estimation is essential for coherent OFDM signal transmissions. So far, many pilot-assisted channel estimation schemes have been proposed. In the case of packet transmission, channel estimation on the same received packet can be repeated many times using the decision feedback to improve the channel estimation accuracy, resulting in decision directed block iterative channel estimation (DD-BICE). However, decision feedback of erroneously detected data symbols degrades the resulting bit error rate (BER) performance. A 2-dimensional (2D) averaging filter can be used for reducing the impact of decision feedback errors. In this paper, a theoretical analysis is presented for DD-BICE taking into account the decision feedback errors assuming quadrature phase shift keying (QPSK) data modulation. The impact of 2D averaging filter is discussed and the validity of the theoretical analysis is confirmed by computer simulation.
UR - https://www.scopus.com/pages/publications/46949105436
UR - https://www.scopus.com/pages/publications/46949105436#tab=citedBy
U2 - 10.1109/ICCS.2006.301470
DO - 10.1109/ICCS.2006.301470
M3 - Conference contribution
AN - SCOPUS:46949105436
SN - 1424404118
SN - 9781424404117
T3 - 2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006
BT - 2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006
T2 - 10th IEEE Singapore International Conference on Communications Systems, ICCS 2006
Y2 - 30 October 2006 through 1 November 2006
ER -