TY - GEN
T1 - Frequency domain estimation of multiple access OFDM channels
AU - Al-Naffouri, Tareq Y.
AU - Mukaddam, Ashfaq Ahmed
PY - 2007
Y1 - 2007
N2 - OFDM modulation combines the advantages of high achievable rates and relatively easy implementation. However, for proper recovery of the input, the OFDM receiver needs accurate channel information. Most algorithms proposed in literature perform channel estimation in the time domain which increases the computational complexity in multiaccess situations where the user is only interested in part of the spectrum. In this paper, we propose a frequency domain algorithm for channel estimation in OFDM. The algorithm performs eigenvalue decomposition of the channel autocorrelation matrix and approximates the channel frequency response seen by each user by the first few dominant eigenvectors. This reduces the parameter estimation space and allows estimation using a few number of pilots1.
AB - OFDM modulation combines the advantages of high achievable rates and relatively easy implementation. However, for proper recovery of the input, the OFDM receiver needs accurate channel information. Most algorithms proposed in literature perform channel estimation in the time domain which increases the computational complexity in multiaccess situations where the user is only interested in part of the spectrum. In this paper, we propose a frequency domain algorithm for channel estimation in OFDM. The algorithm performs eigenvalue decomposition of the channel autocorrelation matrix and approximates the channel frequency response seen by each user by the first few dominant eigenvectors. This reduces the parameter estimation space and allows estimation using a few number of pilots1.
KW - Channel estimation
KW - Frequency domain estimation
KW - OFDM
KW - Parameter reduction
UR - http://www.scopus.com/inward/record.url?scp=60349103238&partnerID=8YFLogxK
U2 - 10.1109/ICSPC.2007.4728502
DO - 10.1109/ICSPC.2007.4728502
M3 - Conference contribution
AN - SCOPUS:60349103238
SN - 9781424412365
T3 - ICSPC 2007 Proceedings - 2007 IEEE International Conference on Signal Processing and Communications
SP - 1047
EP - 1050
BT - ICSPC 2007 Proceedings - 2007 IEEE International Conference on Signal Processing and Communications
T2 - 2007 IEEE International Conference on Signal Processing and Communications, ICSPC 2007
Y2 - 14 November 2007 through 27 November 2007
ER -