Accurate Acquisition of High Order Double Binary Offset Carrier Signals for High Dynamic Environment

For the problem of without accurate acquisition of Double Binary Offset Carrier (DBOC) modulated signal for high dynamic environment, a method which is based on Partial Matched Filtering (PMF) - Fast Fourier Transform (FFT) is proposed. According to the problem of low detection performance caused by the related loss and scallop loss, a new improved acquisition scheme is proposed. Firstly, the Discrete Polynomial phase Transform (DPT) is used to remove the high order dynamic term of the received signal, and then the PMF-FFT algorithm is redesigned for the DBOC signal. Finally, the spectrum correction method is used to correct the maximum power spectrum after FFT. Simulation results show that, under the same conditions, the proposed scheme improves the detection probability by about 2 dB, and shortens effectively the acquisition time.