| 摘要 |
<p>An 8-Ary PSK demodulation apparatus for receiving an input signal Rk(Xk, YK) comprised of a kth quadrature-phase component Y¿k? and a k?th¿ in-phase component X¿k, ?and for generating soft decision values Μ(?S¿K,0), Μ(SK,1), and Μ(SK,2). A calculator calculates Zk by subtracting a level |Y| of the quadrature-phase signal component YK from a level |XK| of the in-phase signal component Xk. A first selector selects the Zk, according to an MSB of the quadrature-phase signal component Yk. A second selector selects the Zk or the reverse ZK according to an MSB of the in-phase signal component Xk. A third selector selects an output of the second selector or a value '0' according to an MSB of the ZK.</p> |
