Patent ID: 9161333
Filing Date: 2015-10-13
Classification: H04B,H04J,H04L,H04W

Abstract:
1. 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, said intentionally created multipath distortion being created by broadcasting a signal and at least one time-delayed version of said broadcast signal; 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; after said receiving said notification: notifying said first subscriber station and said second subscriber station of results of said allocating, said notifying using at least one downlink common control channel.