Patent ID: 8401196

Claim:
A method in a wireless communications network for determining a Joint Randomness Not Shared by Others (JRNSO), the method comprising transmitting a first signal, including a first pilot, from a first transmit element during a JRNSO period, upon applying a first JRNSO function to the first signal; receiving a second signal, including a second pilot and a second channel effect, over a first receive element and at least one second receive element during the JRNSO period, wherein a second JRNSO function has been applied to the second signal; transmitting two versions of a third signal that comprises the second signal, from the first transmit element during the JRNSO period, upon applying the first JRNSO function to the third signal, wherein a first version of the third signal comprises a first receive element version and a second version of the third signal comprises at least one second receive element version; receiving a fourth signal, including the first signal, a first channel effect and the second channel effect, over the first receive element and the at least one second receive element during the JRNSO period, wherein the second JRNSO function has been applied to the fourth signal; processing the received signals to determine overall channel effects; determining the JRNSO based on the determined overall channel effects; and transmitting a fifth signal, during a data period, upon applying a data function to the fifth signal.