Patent ID: 8219138

Claim:
A computerized optimal power allocation method for an LSSTC wireless transmission system, comprising the steps of: obtaining channel state information (CSI) and direction of arrival data (DOA) as feedback from a receiver of the LSSTC wireless transmission system; formulating a power allocation (PA) vector K=[K 1 , K 2 , . . . , K M-1 ], where K i is the ratio of transmit power of the i th layer to the sum of power of layers i+1, . . . , K, K i , being defined by the relation: K i = P i ∑ j = i + 1 K ⁢ P j , i = 1 , 2 , … ⁢ , K - 1 , where P i denotes the transmit power of the i th layer; characterizing the optimum power allocation (OPA) processing by the power allocation (PA) vector, the PA formulation being based on the CSI and the DOA; obtaining an average symbol error probability, P av|(K,N 0 ) , from the LSSTC wireless transmission system; and numerically differentiating the average symbol error probability, P av|(K,N 0 ) , with respect to an OPA pattern K, the OPA pattern K being derived from the power allocation vector and being characterized by a value of K=[K 1 , K 2 , . . . , K K-1 ] satisfying a partial differential equation defined as ∂ P av | ( κ , N 0 ) ∂ K i = 0 , i = 1 , 2 , … ⁢ , K - 1.