Table 1 The solution of the optimization problem in the AWGN environment.

   For k = 1, 2, ..., N

According to the Proposition 1, find the optimal {w _i , 1 ≤ i ≤ k} associated with k;

From (23), find the optimal ε associated with k;

Find the optimal τ _s associated with k through solving the optimization problem P4, and get the maximal throughput R _k associated with k;

End

Find the optimal $k^{*}=\underset{1\le k\le N}{argmax}\left\{R_k\right\}$, and get the optimal {w _i , 1 ≤ i ≤ k}, τ _s , and ε associated with k*.