Alternate binary offset carrier (AltBOC) signal acquisition device

The invention discloses an alternate binary offset carrier (AltBOC) signal acquisition device. The device comprises a sideband processing module, a correlator module, a decision variable generating module and a threshold decision module, wherein the sideband processing module comprises a sub-carrier signal generator, a low pass filter and a multiplier; the correlator module comprises a spectrum-spreading code generator and an integrator; and the decision variable generating module comprises two component synthesizers, four comparators, an incoherent accumulator and three adders. In the device, the AltBOC signal is divided into two-path like quadrature phase-shift keying (QPSK) signals by frequency shift to eliminate the wrong acquisition caused by the sub-carrier signal of the AltBOC signal; and the upper and lower sideband signals of the AltBOC signal adopt an incoherent accumulation manner so as to reduce the complexity of realization.