A Novel Frequency Offset Estimation Method for Distributed MIMO Systems with Large Estimation Range
RSKT '09 Proceedings of the 4th International Conference on Rough Sets and Knowledge Technology
A novel MAP estimation algorithm for multiple frequency offsets in distributed MIMO system
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
SAGE based joint timing-frequency offsets and channel estimation in distributed MIMO systems
Computer Communications
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In this paper, we consider the problem of joint channel and frequency offset estimation in a flat-fading multi- input multi-output (MIMO) system. We assume that each pair of transmit and receive antennas has a different frequency offset. We present two computationally efficient iterative algorithms based on expectation conditional maximization (ECM) and space-alternating generalized expectation-maximization (SAGE) algorithms. The mean-square-error (MSE) performance of the interested parameters for the proposed algorithms is compared with the Cramer-Rao Bound (CRB). Simulation results show that the proposed iterative algorithms achieve the CRB and overcome the drawbacks of existing algorithms.