Patent ID: 8081721
Filing Date: 2011-12-20
Classification: H04B,H04L

Abstract:
1. A method of performing communication in a communication system using relaying and Orthogonal Frequency Domain Multiplexing (OFDM), wherein a transmitting radio node, at least one receiving radio nod; and at least one relay radio node are engaged in a communication session, and signals are transmitted in the form of OFDM chunks comprising a plurality of OFDM symbols, the method comprising a transmission phase wherein a 2-dimensional cyclic prefix is added to a representation of an OFDM chunk by: pre-appending to the representation of the OFDM chunk the last OFDM symbol of the representation of the OFDM chunk corresponding to the last column of the representation of the OFDM chunk; after the pre-appending, copying a pre-determined number of last rows of the pre-appended representation of the OFDM chunk to the top of the representation of the OFDM chunk, thereby forming an augmented OFDM chunk.