TY - GEN
T1 - Carrier frequency offset and channel estimation in space-time non-regenerative two-way relay network
AU - Thiagarajan, L. B.
AU - Sun, Sumei
AU - Quek, Tony Q.S.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - Two-way relaying is an effective approach to exchange information between two simultaneously transmitting sources in wireless fading environment. Space-time non-regenerative relaying aids to keep the relay hardware simple and cheap. Accurate estimates for the channel and carrier frequency offset (CFO) are required by the receiver to reap the benefits from relaying. In this paper, we propose a training frame format for relay transmission and formulate a subspace based CFO and channel estimator. The estimation problem is shown to be similar to the joint CFO and channel estimation in a multiuser uplink system. Furthermore, the relay and source nodes are not required to adjust their carrier frequencies. Numerical results show that the mean square error performance of the proposed estimators can reach their corresponding Cramer-Rao lower bounds.
AB - Two-way relaying is an effective approach to exchange information between two simultaneously transmitting sources in wireless fading environment. Space-time non-regenerative relaying aids to keep the relay hardware simple and cheap. Accurate estimates for the channel and carrier frequency offset (CFO) are required by the receiver to reap the benefits from relaying. In this paper, we propose a training frame format for relay transmission and formulate a subspace based CFO and channel estimator. The estimation problem is shown to be similar to the joint CFO and channel estimation in a multiuser uplink system. Furthermore, the relay and source nodes are not required to adjust their carrier frequencies. Numerical results show that the mean square error performance of the proposed estimators can reach their corresponding Cramer-Rao lower bounds.
UR - http://www.scopus.com/inward/record.url?scp=70449585248&partnerID=8YFLogxK
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U2 - 10.1109/SPAWC.2009.5161789
DO - 10.1109/SPAWC.2009.5161789
M3 - Conference contribution
AN - SCOPUS:70449585248
SN - 9781424436965
T3 - IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
SP - 270
EP - 274
BT - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
T2 - 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009
Y2 - 21 June 2009 through 24 June 2009
ER -
