Patent ID: 8149756

Claim:
A relay node for being interposed between at least one source node and at least one destination node, comprising: a data processor; and a memory storing computer program code, the memory and the computer program code being configured to, with the data processor, cause the relay node at least to perform: receive a transmission signal from the at least one source node; and modify the received transmission signal in a substantially pseudo-random manner to generate a time-varying signal that is to be transmitted by the relay node to the at least one destination node, wherein a complex channel h 23 between the relay node (node 2 ) and the at least one destination node (node 3 ) is modified at a time slot t to: {tilde over (h)} 23 [t ]=√{square root over ( p 2 [t ])} w 2 [t]h 23 where p 2 [t] is a transmit power of the relay node and w 2 [t] is a unit-power complex-valued coefficient applied at the relay node.