In addition, an optimal power allocation scheme is presented by maximizing the optimal weight combining to enhance the SS performance by following some conditions.

The function of quantization bit levels of the transmit power from (15), and defining hi =BN0, can be expressed as follows, to simplify the problem and derive closed form expressions:

Note that the reliance of d2(w, p) on the transmit power vector p enters (33) through the {qi} terms by (14) and (15).