A gain of 15 dB was obtained for the new
suggested method in comparing with the traditional technique
when both are operated without zero padding. The losses is
increased by a 3 dB for the traditional model while it is
approximately not affected by adding the zeros at the
transmitter side in the suggested model, and this leads to
additional saved power, namely the gain will be 18 dB for the
new proposed model at BER=10-4.