4.6 Continuing Mapping Theorem The signal power wenj小s川 “[+,62A1小'H [2A+n八j】 where (a)is due toxx,x is a row vector and is the 2-norm of vector 88 4.6 Continuing Mapping Theorem The signal power : 2 1 2 1 1 1 (a) 2 2 1 1 2 1 2 1 | | K H H k i i N k k i K K H H H H H k i i N k k k k i i N k i i K H H k i i N k i E s E s s                                                                   h h h I h H h h h I h h h h I h H h h h I h where (a) is due to , x is a row vector and | | is the 2-norm 2 H x xx  of vector