FIELD: radio engineering.
SUBSTANCE: demodulation device for octic phase-keyed signals receives input signal Rk(Xk, Yk) incorporating k quadrature component Yk and k cophasal component Xk and functions to generate L(sk, 0), L(sk, 1, and L(sk, 2) relaxed-solution values. Computer functions to calculate Zk by subtracting |Yk| level of quadrature signal component Yk from |Xk| level of cophasal signal component Xk. First selector chooses Zk for respective most significant bit of quadrature signal component Yk. Second selector chooses Zk for respective most significant bit of cophasal signal component Xk. Third selector is used to select output signal of second selector or "0" for respective most significant bit in Zk.
EFFECT: facilitated processing required in calculating minimal distance from signal received.
4 cl, 5 dwg
