Patent ID: 8908796

Claim:
A method for time domain windowing of an Orthogonal Frequency Division Multiplexing (OFDM)-based signal, the method comprising: receiving, at a receiver, an OFDM-based signal comprising a plurality of subcarriers; and performing, at the receiver, discrete prolate spheroidal windowing of each of the plurality of subcarriers of the received OFDM-based signal, wherein performing discrete prolate spheroidal windowing of each of the plurality of subcarriers of the received OFDM-based signal further comprises: identifying a spectral location of an edge subcarrier of the plurality of subcarriers; identifying a spectral distance between each of the plurality of subcarriers and the edge subcarrier; identifying a unique windowing function for each of the plurality of subcarriers, the unique windowing function for each of the plurality of subcarriers having a confinement band that is determined by the summation of a guard band of the OFDM-based signal and the spectral distance between the subcarrier and the edge subcarrier; and performing, at the receiver, discrete prolate spheroidal windowing of each of the plurality of subcarriers of the received OFDM-based signal by shaping each of the plurality of subcarriers using the unique windowing function identified for each of the plurality of subcarriers.