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Title: Joint channel estimation and synchronization for MIMO-OFDM in the presence of carrier and sampling frequency offsets
Authors: Nguyen-Le, H.
Le-Ngoc, T.
Ko, C.C. 
Keywords: Carrier frequency offset (CFO)
Channel impulse response (CIR)
Multiple-input multiple-output (MIMO)
Orthogonal frequency division multiplexing (OFDM)
Sampling frequency offset (SFO)
Vector recursive least-square (VRLS) algorithm
Vector recursive least-squares (VRLS) algorithm
Issue Date: 2009
Source: Nguyen-Le, H., Le-Ngoc, T., Ko, C.C. (2009). Joint channel estimation and synchronization for MIMO-OFDM in the presence of carrier and sampling frequency offsets. IEEE Transactions on Vehicular Technology 58 (6) : 3075-3081. ScholarBank@NUS Repository.
Abstract: A pilot-aided scheme is proposed for the joint estimation and tracking of channel impulse response (CIR), carrier frequency offset (CFO) and sampling frequency offset (SFO) in burst mode, multiple-input-multiple-output (MIMO), and orthogonal frequency division multiplexing (OFDM) systems. First, a received signal model that takes into account nonlinear CFO/SFO effects is formulated. Then, based on the derived signal model and the received multicarrier signal samples containing the pilot tones in the frequency domain, an objective function that includes MIMO CIR, CFO, and SFO is introduced to develop a vector recursive-least-square (RLS)-based joint channel estimation and synchronization algorithm. The analysis and simulation results show that, over the large ranges of the CFO and SFO values, the proposed estimation and tracking scheme offers fast convergence, high stability, and a near-optimum receiver performance that is remarkably close to the ideal performance in the case of perfect channel estimation and synchronization over quasi-static Rayleigh multipath fading channels. © 2009 IEEE.
Source Title: IEEE Transactions on Vehicular Technology
ISSN: 00189545
DOI: 10.1109/TVT.2008.2006178
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