Research For Performance Of High-order BOC Modulation And Receiving Method Verification

BOC(Binary Offset Carrier)modulation signals are now widely used in various systems because of its advantages in positioning accuracy,anti-multipath and multiplexing.However,signals in high-order BOC modulation cause some trouble for its wide spectrum and large number of side-peaks of auto-correlation function,in order to deal with this,the study of the thesis contains the following aspects:Firstly,it gives the outline of the different signal structures,then overviews the characteristics of the high order BOC signal,studies the influence of Sine modulation and Cosine modulation on the high order BOC,compares the performance of different BOC modulation signals,the study shows that the high order BOC signal has a greater advantage in the code tracking accuracy and anti-jamming performance.Then The high order BOC acquisition time,acquisition probability and false alarm probability are analyzed as well.Secondly,summarizes the architecture and signal processing of the navigation receiver,analyzes the source of the ambiguity,discusses the influence of important parameters in the receiver,including bandwidth,loop noise bandwidth and the space between early and late phase discriminator.For the non ideal factors in real environment,two solutions for high order BOC signal reception are proposed: when receiving a single sideband,the BPSK-like method should be used to capture and track;when the double band is received,the BPSK-like acquisition algorithm is used,and the Bump-Jump algorithm is used to track the correction.finally,In order to verify the high order BOC signal acquisition and tracking performance,using the software receiver to receive the satellite navigation signal,through the experiment,the ranging accuracy of different receiving modes is obtained.Then designed the experiment to simulate multipath interference,and concluded that the two ways of receiving multipath performance.Finally,the theoretical analysis is verified by the experimental results.Based on the these researches,the performance of the high order BOC signal and the receiving mode are studied completely,which provides an important reference for future research.