High sensitivity acquisition of GNSS signals with secondary code on FPGAs
نویسندگان
چکیده
منابع مشابه
High Sensitivity Techniques for GNSS Signal Acquisition
The requirements of location based and emergency caller localization services spurred by the E-911 mandate (USA) and the E-112 initiative (EU) have generated the demand for the availability of Global Navigation Satellite Systems (GNSS) in harsh environments like indoors, urban canyons or forests where low power signals dominate. This fact has pushed the development of High Sensitivity (HS) rece...
متن کاملAcquisition of modern GNSS signals using a modified parallel code-phase search architecture
The acquisition of global navigation satellite system signals can be performed using a fast Fourier transform (FFT). The FFT-based acquisition performs a circular correlation, and is thus sensitive to potential transitions between consecutive periods of the code. Such transitions are not occurring often for the GPS L1 C/A signal because of the low data rate, but very likely for the new GNSS sig...
متن کاملJoint acquisition algorithm with assisted information for weak GNSS signals
In this paper, we propose an enhanced joint acquisition scheme with satellite selection and assisted information to detect weak signals. The theoretical derivation of the joint acquisition is detailed in the principle of the generalized likelihood ratio test (GLRT) to evaluate detection performance. An approximate and simplified architecture is proposed to reduce the computation load. The tradi...
متن کاملFast M-Sequence Transform and Secondary Code Constraints for Composite GNSS Signal Acquisition
In this paper, the problem of coherently extending the integration time for the acquisition of new Global Navigation Satellite System (GNSS) signals is addressed. Unlike the acquisition of legacy GNSS signals, the presence of secondary codes allows the polarity of the transmitted signal to change each primary code period. These polarity changes have to be recovered and symbol combinations have ...
متن کاملFFT Splitting for Improved FPGA-Based Acquisition of GNSS Signals
With modern global navigation satellite system (GNSS) signals, the FFT-based parallel code search acquisition must handle the frequent sign transitions due to the data or the secondary code. There is a straightforward solution to this problem, which consists in doubling the length of the FFTs, leading to a significant increase of the complexity. The authors already proposed a method to reduce t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Aerospace and Electronic Systems Magazine
سال: 2017
ISSN: 0885-8985,1557-959X
DOI: 10.1109/maes.2017.160176