Research on global positioning system M-code acquisition method and the acquisition performance

In global positioning system modernisation, to further enhance the anti-jamming capability of authorised signals, the new designed M-code signal utilises a few revolutionary techniques. While enduing the signal with excellent performance, the techniques make the acquisition methods for conventional pseudo-noise codes, such as C/A-code and P(Y)-code, inapplicable. Furthermore, compared with time-domain correlation, frequency-domain correlation is favourable for saving computation requirements and suppressing interferences. Thus, it is quite desirable to develop frequency-domain-based ones. To this end, a frequency-domain-based acquisition method is developed, and based on the method the acquisition performance of M-code signal is evaluated and the factors associated with the performance are investigated. It is shown that M-code provides flexible tradeoffs between performance and implementation complexity through the sidebands and chips of the signal. Numerical and simulation results demonstrate the results.