n.反向散射(背反射)
Taking the advantages of the accessible range extension and the multi-band backscattering, the proposed scheme can achieve higher SNR and better anti-fading ability. 采用较长接收距离及多频段反向散射讯号之优点，本系统将可以达到较高之讯杂比及抗讯号衰弱等能力。
