ACTA AERONAUTICAET ASTRONAUTICA SINICA >
A Joint acquisition method for navigation signal based on compound carrier with constant false alarm rate
Received date: 2014-07-09
Revised date: 2014-10-13
Online published: 2014-10-29
Supported by
National Natural Science Foundation of China (61102130, 61304235)
Navigation signal based on compound carrier (NSCC), as a novel signal structure for navigation augmentation, has a special multi-carrier structure and flexible structure parameters, which enable it to possess significant efficiency of navigation augmentation. However, due to the special structure of NSCC, the traditional acquisition algorithms cannot be applied to the NSCC. In this paper, based on the characteristics of NSCC, we propose a kind of joint acquisition method with constant false alarm rate for multi-carrier system by utilizing the known information of NSCC. In this method, the adaptive detection threshold of sub-carrier is set respectively according to its power. Besides, the joint detection is achieved by using the sub-carrier frequency interval to improve the acquisition performance and efficiency. Both the theoretical analysis and simulation results illustrate that the acquisition performance of this method beats the single-carrier signal and the acquisition time is also efficiently reduced as well.
LUO Ruidan , XU Ying , YUAN Hong . A Joint acquisition method for navigation signal based on compound carrier with constant false alarm rate[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(7) : 2381 -2390 . DOI: 10.7527/S1000-6893.2014.0285
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