CPC H04L 27/2602 (2013.01) [H04B 7/024 (2013.01); H04B 7/0617 (2013.01); H04L 27/2607 (2013.01)] | 17 Claims |
1. A method of transmitting an Orthogonal Frequency Division Multiplexing, OFDM, symbol comprising a guard interval including a cyclically repeated part of an original symbol, the method comprising
applying a guard interval for the OFDM symbol, the guard interval comprising a first part, where the first part is a cyclic prefix;
determining whether to use the second part of the guard interval, and when it is determined that the second part of the guard interval is to be used:
including an indication that the applied guard interval comprises a second part, the second part being at least one of a cyclic prefix and a postfix;
applying the second part of the guard interval; and
transmitting the OFDM symbol; and
the determining whether to use the second part of the guard interval comprises:
determining whether coordinated beamforming transmission is performed between neighbouring access points;
estimating impact of transients emanating from changes in the coordinated beamforming; and
determining to apply the second part of the guard interval when estimated impact of transients has a timing within the second part of the guard interval.
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