Patent ID: 8050311

Claim:
A method for communication in a wireless communication relay system having a number of network nodes, said system comprising a transmitting node, at least one relaying node, and at least one receiving node, each node with at least one antenna, wherein said method comprises the steps of: said transmitting node forming at least one OFDM symbol; and said transmitting node transmitting a signal comprising said at least one OFDM symbol to the at least one relaying node and directly to the at least one receiving node, said transmitting node configuring a cyclic prefix for said OFDM symbol, wherein the time duration of said cyclic prefix is larger than a predetermined parameter based on a power delay profile of an equivalent channel of said relayed signal and said direct signal, and wherein said parameter is based on at least one or a combination of a maximum delay spread for each said relayed and direct signal, a maximum delay difference between said relayed and direct signals, and a relay node induced delay said at least one relaying node concurrently, and with a latency substantially smaller than the OFDM symbol duration, receiving and amplifying a representation of said signal, and transmitting said amplified representation as a relayed signal in the same frequency band, and said at least one receiving node concurrently receiving a superposition of said direct signal and said relayed signal to enable constructive interference for corresponding said at least one OFDM symbol and providing the extracted OFDM symbol substantially free from Inter Symbol Interference.