Patent ID: 11894962
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A receiver for receiving an Orthogonal Frequency Division Multiplex, OFDM, symbol via a channel, the OFDM symbol comprising a guard interval including a cyclically repeated part of an original symbol OFDM symbol, the receiver comprising:
receiver circuitry configured to receive a signal comprising the OFDM symbol; and
demodulation circuitry configured to:
determine from the signal whether only a first part of the guard interval or also a second part of the guard interval is used for the OFDM symbol, where the second part includes a repeated part in addition to the first part, assign a transform window for the OFDM symbol based on the guard interval, and;
assign a transform window for the OFDM symbol based on the guard interval;
demodulate the OFDM symbol including performing a transform of information within the transform window;
the second part of the guard interval comprises one of:
an extended cyclic prefix in addition to the first part of the guard interval; and
cyclic prefix; and

the assigning of the transform window includes one of:
overlapping the transform window with the second part of the cyclic prefix such that a final part of the OFDM symbol is outside the transform window; and
overlapping the cyclic prefix part of the OFDM symbol with the transform window such that a final part of the OFDM symbol is outside the transform window.