Modeling the Behavior of Peaks of OFDM Signal Using ‘Peaks Over Threshold’ Approach

New expressions for symbol error probability (SEP) in the presence of peak-to-average-power-ratio/clipping are derived from the orthogonal frequency division multiplexing systems. These expressions are significantly tighter than the expression in the existing literature, since we model the peak behavior using a peak over threshold approach. An adaptive back-off scheme is also proposed and its SEP is derived. It is shown that with negligible SEP degradation, the adaptive back-off scheme saves power.