A Novel Pseudo-code Spread Spectrum Modulation Scheme of Frequency Chirp Binary Offset Garrier and Its Characteristics

In this paper, based on the mathematical model of conventional Binary Offset Carrier (BOC) modulation, a novel pseudo-code spread spectrum modulation scheme of Frequency Chirp Binary Offset Carrier (FC-BOC) is proposed. FC-BOC modulation scheme is constructed by introducing the binary offset carrier of frequency chirp instead of binary offset carrier of fixed frequency in the conventional BOC modulation mathematical model. Therefore, FC-BOC signal has a lot of characteristics inherited from BOC signal and several unique characteristics. Simulation and algorithm experiment show that the FC-BOC modulation scheme retains the primary advantages of BOC modulation, moreover, the FC-BOC signal acquires a narrow and sharp correlation main-peak with extremely suppressed side-peaks for avoiding multiple correlation peak ambiguity naturally, flat power spectral density function similar to band-pass white noise. FC-BOC modulation systems, either signal generating algorithms or signal receiving algorithms, have similar structure and equivalent complexity to conventional BOC modulation.