Patent ID: 8498360

Claim:
A method for enhancing capacity in an orthogonal frequency division multiple access (OFDMA) wireless system, said method comprising: intentionally creating a multi-path distortion in signals broadcast from a base station in an otherwise flat fading environment; allocating a first plurality of subcarriers to a first subscriber station and a second plurality of subcarriers to a second subscriber station based upon a determination of diversity gains of said first and second subscriber stations, said determination being based, at least in part, on said intentionally created multi-path distortion; receiving a notification that a retraining is needed for said first subscriber station based on a measured channel deterioration for said first subscriber station; and after said receiving said notification: broadcasting new signals with a new intentionally created multi-path distortion; redetermining said diversity gains of at least said first subscriber station; and allocating a new first plurality of subcarriers to said first subscriber station based on said redetermined diversity gains, at least one subcarrier of said new first plurality of subcarriers being different from at least one subcarrier of said first plurality of subcarriers.