Patent ID: 8422577
Filing Date: 2013-04-16
Classification: H04L

Abstract:
1. A method of adjusting a length of a cyclic prefix used in orthogonal frequency division multiplexing (OFDM) communications, comprising: transmitting, through an access point, OFDM signals using a first cyclic prefix length; receiving a first plurality of signal quality reports from user devices being served by said access point, wherein each of said signal quality reports indicates a reported signal quality value; determining a distribution of reported signal quality values based on said first plurality of signal quality reports; selecting a second cyclic prefix length based, at least in part, on said first plurality of signal quality reports, wherein selecting said second cyclic prefix length based, at least in part, on said signal quality reports comprises selecting said second cyclic prefix length based, at least in part, on said distribution of reported signal quality values; and transmitting, through said access point, OFDM signals using said second cyclic prefix length.