A single word detection device modulated in BPSK adapted to an analog modem operating in TMDA mode and detection method implemented in such a device.

摘要

P A carrier recovery device of a TDMA type signal provides the complex envelope (rk) of this signal on a real path (P) and an imaginary path (Q). Angle-shift means (60, 61) of pi / 4 of the constellation of the complex envelope (rk) provides a complex signal (zk) on a main channel and an auxiliary channel. Energy detecting means (65, 66, 67, 68, 69) drives a multiplexer (70) to provide a correlator (71) with the real or imaginary channel carrying the most important energy . The correlator (71) calculates the correlation level (x) between the output signal of the multiplexer (70) and a single word (MU) of reference. Comparison means (72, 73, 74) of the correlation level (x) with a threshold value (S) indicates detection of the unique word (MU) in the signal of the channel applied to the correlator (71). / P