= 1, the pathloss for dif- Consider a channel with normalized noise level ferent subbands PL =0., 13. 20dB, respectively, and total power constraint P 100. Compute the maximal admissible capacity when using water- filling algorithm. What capacity can be achieved if the TX uses BPSK modu- lation format? Is it possible to improve the capacity in this case by a different power allocation, such as equal power allocation and pre-distortion? Why?