Efficient joint frequency synchronization and channel estimation in OFDM systems

The problem of joint carrier frequency offset (CFO) and channel estimation in orthogonal frequency division multiplexing (OFDM) systems is investigated in this study. The exact solution to this problem turns out to be too complex for practical purposes. To overcome this difficulty, we resort to the recursive least square (RLS) algorithm and propose an iterative scheme which iterates between estimating the channel parameters and the frequency offset. This results in an estimation algorithm of a reasonable complexity which is suitable for practical applications.