Patent ID: 7340013

Claim:
A method of scaling samples of an encoded signal iteratively decoded to generate decoded data, the method comprising the steps of: (a) generating a root mean square (RMS) value for samples within a slot; (b) calculating a scaling factor based on the RMS value of the slot; and (c) scaling the input samples of the slot based on the scaling factor, wherein the scaling factor (1/c) is set as: 1 c ≈ 4 * 0.798 * SNR 2 + 1 0.65 * ( 2 q - 1 - 1 ) * RMS i = M i RMS i , where SNR is a signal-to-noise ratio value, M i is a constant for the ith slot, q is a number of bits defined by a digital quantizing method, and RMS i is the RMS value of the samples over the ith slot.