TY - GEN
T1 - Estimation of synchronization parameters in AF cooperative networks
AU - Nasir, Ali A.
AU - Mehrpouyan, Hani
AU - Blostein, Steven D.
AU - Durrani, Salman
AU - Kennedy, Rodney A.
PY - 2012
Y1 - 2012
N2 - In cooperative networks, multiple carrier frequency offsets (MCFOs) and multiple timing offsets (MTOs) originate due to multiple distributed nodes. In this paper, algorithms for joint estimation of these parameters and channels in amplify-and-forward (AF) relaying networks are proposed. A new training model and transceiver structure at the relays for achieving synchronization throughout the network is devised. New exact closed-form expressions for the Cramér-Rao lower bounds (CRLBs) for the multi-parameter estimation problem are derived. An estimation method is proposed for jointly estimating MCFOs, MTOs, and channel gains at the destination based on space-alternating generalized expectation maximization (SAGE) and compared to a computationally-intensive least squares (LS) approach. The proposed estimator's performance is shown to be close to the CRLB at mid-to-high signal-to-noise ratio (SNR) resulting in significant cooperative performance gains in the presence of practical impairments.
AB - In cooperative networks, multiple carrier frequency offsets (MCFOs) and multiple timing offsets (MTOs) originate due to multiple distributed nodes. In this paper, algorithms for joint estimation of these parameters and channels in amplify-and-forward (AF) relaying networks are proposed. A new training model and transceiver structure at the relays for achieving synchronization throughout the network is devised. New exact closed-form expressions for the Cramér-Rao lower bounds (CRLBs) for the multi-parameter estimation problem are derived. An estimation method is proposed for jointly estimating MCFOs, MTOs, and channel gains at the destination based on space-alternating generalized expectation maximization (SAGE) and compared to a computationally-intensive least squares (LS) approach. The proposed estimator's performance is shown to be close to the CRLB at mid-to-high signal-to-noise ratio (SNR) resulting in significant cooperative performance gains in the presence of practical impairments.
UR - https://www.scopus.com/pages/publications/84871957028
U2 - 10.1109/ICC.2012.6363669
DO - 10.1109/ICC.2012.6363669
M3 - Conference contribution
AN - SCOPUS:84871957028
SN - 9781457720529
T3 - IEEE International Conference on Communications
SP - 3713
EP - 3717
BT - 2012 IEEE International Conference on Communications, ICC 2012
ER -