Patent ID: 7583583

Claim:
A method of reducing a peak-to-average power ratio (PAPR) in communications signals using reserve tones, said method comprising: obtaining a communications symbol; for n iterations, where n is a positive integer, subjecting said communications symbol to a hard limiter; defining clip signal components of said communications symbol; filtering said clip signal components using a g-function; providing a delay in conjunction with said defining and said filtering steps so as to form a delayed communications symbol; and subtracting an output of said filtering step from said delayed communications symbol so as to produce an output signal y(n) having a reduced PAPR; wherein said output y(n) is derived from the iteration y ( n )= y ( n− 1)−ξ· Gy clip ( n− 1) where y clip (n) is one said clip signal component, ξ is a positive constant between 0 and 1, and G is a mapping matrix.