a receiver for an orthogonal frequency division multiplex radio signal in which a carrier frequency is modulated by sub - carrier signals coded with data . analogue signal processing means produces base - band analogue signals in phase quadrature and analogue - to - digital converters convert the analogue signals to phase quadrature digital signals , xq ). the digital signal processor includes the ofdm demodulator and mismatch compensation . the mismatch compensation combines each of the reproduced sub - carrier signals with a limited number of the reproduced sub - carrier signals according to respective frequency offset coefficient that is a function of an estimated value of the offset of the reference frequency relative to the carrier frequency .