Abstract
Cooperative communication systems have attracted much attention recently due to their desirable performance gain while using single antenna terminals. This paper addresses the joint timing and channel estimation problem, and furthermore the resynchronization of multiple timing offsets in a cooperative relay system. The estimations of timing and channel are conducted in two phases and the associated Cramér-Rao bounds (CRB) are derived for both phases. It is demonstrated that the conventional CRB is not valid for timing parameters under fading conditions, and a new bound called Weighted Bayesian CRB is proposed. With the timing and channel estimates, a general framework of the resynchronization filter design is developed in order to compensate the multiple timing offsets at the destination. The proposed methods are applied to different scenarios with varying degrees of timing misalignment and are numerically shown to provide excellent performances that approach the perfectly synchronized case.
| Original language | English |
|---|---|
| Pages (from-to) | 1444-1455 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Signal Processing |
| Volume | 57 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2009 |
| Externally published | Yes |
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Keywords
- Channel estimation
- Cooperative
- Cramér-Rao bound (CRB)
- Resynchronization
- Tikhonov regularization
- Timing offset
ASJC Scopus subject areas
- Signal Processing
- Electrical and Electronic Engineering
Cite this
Timing synchronization in decode-and-forward cooperative communication systems. / Li, Xiao; Wu, Yik Chung; Serpedin, Erchin.
In: IEEE Transactions on Signal Processing, Vol. 57, No. 4, 2009, p. 1444-1455.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Timing synchronization in decode-and-forward cooperative communication systems
AU - Li, Xiao
AU - Wu, Yik Chung
AU - Serpedin, Erchin
PY - 2009
Y1 - 2009
N2 - Cooperative communication systems have attracted much attention recently due to their desirable performance gain while using single antenna terminals. This paper addresses the joint timing and channel estimation problem, and furthermore the resynchronization of multiple timing offsets in a cooperative relay system. The estimations of timing and channel are conducted in two phases and the associated Cramér-Rao bounds (CRB) are derived for both phases. It is demonstrated that the conventional CRB is not valid for timing parameters under fading conditions, and a new bound called Weighted Bayesian CRB is proposed. With the timing and channel estimates, a general framework of the resynchronization filter design is developed in order to compensate the multiple timing offsets at the destination. The proposed methods are applied to different scenarios with varying degrees of timing misalignment and are numerically shown to provide excellent performances that approach the perfectly synchronized case.
AB - Cooperative communication systems have attracted much attention recently due to their desirable performance gain while using single antenna terminals. This paper addresses the joint timing and channel estimation problem, and furthermore the resynchronization of multiple timing offsets in a cooperative relay system. The estimations of timing and channel are conducted in two phases and the associated Cramér-Rao bounds (CRB) are derived for both phases. It is demonstrated that the conventional CRB is not valid for timing parameters under fading conditions, and a new bound called Weighted Bayesian CRB is proposed. With the timing and channel estimates, a general framework of the resynchronization filter design is developed in order to compensate the multiple timing offsets at the destination. The proposed methods are applied to different scenarios with varying degrees of timing misalignment and are numerically shown to provide excellent performances that approach the perfectly synchronized case.
KW - Channel estimation
KW - Cooperative
KW - Cramér-Rao bound (CRB)
KW - Resynchronization
KW - Tikhonov regularization
KW - Timing offset
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UR - http://www.scopus.com/inward/citedby.url?scp=63449114564&partnerID=8YFLogxK
U2 - 10.1109/TSP.2008.2011834
DO - 10.1109/TSP.2008.2011834
M3 - Article
AN - SCOPUS:63449114564
VL - 57
SP - 1444
EP - 1455
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
SN - 1053-587X
IS - 4
ER -