Minimum-Error-Probability CFO Estimation for Multiuser MIMO-OFDM Systems

摘要: We consider carrier frequency offset (CFO) estimation in the context of multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems over noisy frequency-selective wireless channels with both single- and multiuser scenarios. conceived a new approach for parameter by discretizing continuous-valued CFO into discrete set bins then invoked detection theory, analogous to minimum-bit-error-ratio optimization framework detecting finite-alphabet received signal. Using this radical approach, we propose novel method study its performance using analytical results Monte Carlo simulations. obtain expressions variance error resultant BER degradation single-user scenario. Our simulations demonstrate that overall MIMO-OFDM system proposed is substantially improved all modulation schemes considered, albeit achieved at increased complexity.