Diskrimineringsinnretning av automatisk modulasjonstype og diskriminerings-fremgangsmÕte for diskriminering av mange slag av modulasjonstyper

摘要

PROBLEM TO BE SOLVED: To realize a single identification device that identifies a modulation system of a received signal with unknown various communication item without previous provision of various known communication items with respect to a plurality of modulation systems. ;SOLUTION: The identification device is provided with an analog/digital modulation system identification circuit 1 that identifies a received signal as to whether the received signal adopts an analog modulation system, a linear digital modulation system or a nonlinear digital modulation system, an analog modulation system identification circuit 2 that identifies the received signal as to whether the received signal adopts an AM analog modulation system or an FM analog modulation system when the circuit 1 discriminates the analog modulation system, a linear modulation system identification circuit 3 that identifies the received signal as to whether the received signal adopts a BPSK, a QPSK, a π/4-shift QPSK, an 8-PSK, a multi-value M-ary, a PSK, a 16 QAM, in excess of an octal value, or a multi-value M-ary in excess of a rexadecimal value among linear digital modulation system when the circuit 1 discriminates the linear digital modulation system, and a nonlinear modulation system identification circuit 4 that identifies the received signal as to whether the received signal adopts an M-ary, an FSK, a 2-FSK, an MSK or a GMSK among a nonlinear digital modulation system when the circuit 1 discriminates the nonlinear digital modulation system.;COPYRIGHT: (C)2001,JPO