Patent ID: 8600293

Claim:
A relay gain assignment method, performed in a multiple-input and multiple-output (MIMO) relay system, the MIMO relay system comprising M spatial degrees of freedom and L relay terminals, the relay gain assignment method comprising the steps of: (a) defining a system model for the MIMO relay system according to channel information of the MIMO relay system, wherein the system model comprises a relay-connected noise and a destination-connected noise; (b) calculating power of the relay-connected noise and power of the destination-connected noise; (c) determining that the power of the relay-connected noise is smaller than the power of the destination-connected noise; (d) defining a destination-connected noise dominating model based on the determination result of the step (c); (e) calculating L relay gains for the L relay terminals according to the destination-connected noise dominating model; and (f) assigning each of the relay gains to the corresponding relay terminal of the MIMO relay system, wherein M and L are positive integers.