Research on global positioning system M‐code acquisition method and the acquisition performance
Hong Li, Mingquan Lu · IET Communications · 2014
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.