Decreasing the dynamic range of OFDM signals based on extrapolation for information security increasing

The problem of energy secrecy increasing for OFDM-based wireless systems is considered. The energy secrecy increasing method based on signals extrapolation and differential transformation is suggested. The possible structure of OFDM-system with signal extrapolation is described. It is shown that extrapolator may be based on Kalman filter. The problem of extrapolation parameters synthesis is formulated and solved for synchronous OFDM system and AWGN-channel. Difference signals orthogonality is proved. Energy secrecy increasing is shown by the example, the probability of signal unauthorized detection in the air is used as a measure of secrecy.