A　semi-blind　method　for　joint　estimation　of　the　frequency　offset　and　the　channel　in　an　MIMO　OFDM　system　is　presented　in　this　paper.　Estimation　is　achieved　in　three　successive　steps.　First,　the　channel　containing　the　frequency-offset　component　is　estimated　by　means　of　subspace　techniques　and　few　pilots.　The　result　is　then　used　in　the　second　step,　which　is　cyclostationarity-based,　to　obtain　the　frequency　offset.　Finally,　the　channel　can　be　achieved　by　removing　the　frequency-offset　component　from　the　result　of　the　first　step.　Mathematical　deduction　and　simulation　results　are　both　shown　that　the　proposed　method　is　effective.　And　the　number　of　pilots　required　by　this　algorithm　equals　the　number　of　transmit　antennas,　which　is　significantly　less　than　that　in　the　pure-pilot-based　channel　estimation　algorithm.　©　2010　IEEE.