GPS L1, L2C Signal Acquisition Performance of GPS Software Receiver with respect to Pseudolite Pulsing Scheme

Scintillations are caused by ionospheric plasma-density irregularities and can lead to signal power fading, loss of lock of the carrier tracking loop in the GPS receiver. The traditional method of monitoring and mitigating scintillation is to transform commercial GPS receiver with modified hardware and embedded software. To better facilitate advance development GPS receiver under different condition, GPS software scintillation receiver is designed in this paper. The hardware scheme of high-speed GPS signal acquisition system is first discussed and implemented with FPGA and DSP architecture. Then, we describe receiver software processing algorithm, particularly the portion involving the scintillation signal acquisition and tracking, ionospheric scintillation index extracting and scintillation monitoring. The performance of software receiver is demonstrated under scintillation conditions. Relevant results show that software-receiver based approach can avoid weak signal loss and extract effectively ionospheric scintillation parameter compared with the traditional extracting method. Software receiver is suitable and reliable for the ionospheric scintillations monitoring, and can provide theoretical foundations and experimental preparations for future scintillation studies implemented with Chinese indigenous BeiDou-Ⅱ navigation and poisoning system.

Download Full-text

Partial Differential Postcorrelation Processing for GPS L2C Signal Acquisition

IEEE Transactions on Aerospace and Electronic Systems ◽

10.1109/taes.2012.6178062 ◽

2012 ◽

Vol 48 (2) ◽

pp. 1287-1305 ◽

Cited By ~ 15

Author(s):

Tung Hai Ta ◽

Sana U. Qaisar ◽

Andrew G. Dempster ◽

Fabio Dovis

Keyword(s):

Signal Acquisition ◽

Partial Differential ◽

L2c Signal

Download Full-text

Weak Signal Acquisition Performance for Different Pilot Channel Design Options

Lecture Notes in Electrical Engineering - China Satellite Navigation Conference (CSNC) 2014 Proceedings: Volume II ◽

10.1007/978-3-642-54743-0_6 ◽

2014 ◽

pp. 59-69

Author(s):

Yingxiang Liu ◽

Huaming Chen ◽

Zhicheng Lv ◽

Feixue Wang

Keyword(s):

Signal Acquisition ◽

Weak Signal ◽

Channel Design ◽

Acquisition Performance ◽

Design Options ◽

Pilot Channel

Download Full-text

GPS Signal Acquisition Based on an Improved Genetic Algorithm

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.2909 ◽

2013 ◽

Vol 291-294 ◽

pp. 2909-2912

Author(s):

Min Shi ◽

Cong Cong Tian ◽

Qing Ming Yi

Keyword(s):

Genetic Algorithm ◽

Initial Population ◽

Signal Acquisition ◽

Improved Genetic Algorithm ◽

Search Range ◽

Acquisition Performance ◽

Signal Parameters ◽

Dynamic Search ◽

Gps Signal Acquisition ◽

Crossover And Mutation

In order to solve the problem of GPS signal acquisition, an acquisition algorithm based on an improved genetic algorithm (IGA) is proposed in this paper. The IGA employs the technologies including the dynamic search range of parameter, the adaptive probabilities of crossover and mutation, and the small section method for generation of an initial population to search Doppler shift and code phase. Simulations and experiment results show that the proposed method can acquire the signal parameters precisely and rapidly. Consequently, the acquisition performance is improved.

Download Full-text

BOC Signal Acquisition Algorithm Based on Similar Enfoldment

International Journal of Aerospace Engineering ◽

10.1155/2020/4314132 ◽

2020 ◽

Vol 2020 ◽

pp. 1-19

Author(s):

Qi Han ◽

Kejia Zhu ◽

Caibo Hu ◽

He Zhao ◽

Shuang Wu ◽

...

Keyword(s):

Autocorrelation Function ◽

Global Navigation Satellite System ◽

Satellite System ◽

Secondary Peak ◽

Main Peak ◽

Signal Acquisition ◽

Navigation Satellite ◽

Acquisition Performance ◽

Global Navigation ◽

Global Navigation Satellite

A BOC signal has been widely used in the Global Navigation Satellite System (GNSS). Although the BOC signal has many advantages, the autocorrelation function (ACF) of the BOC signal has lots of peaks, which makes signal acquisition difficult. This paper proposes a similar enfoldment acquisition (SEA) algorithm, which can be applied to sin-BOC and cos-BOC signals, with even and odd modulation orders. The SEA algorithm utilizes the similarity between the main peak and the secondary peak to construct a new ACF to eliminate the ambiguity of the BOC signal. This paper simulates the acquisition performance of the SEA algorithm, Martin algorithm, and SCPC algorithm, while the simulation result shows that the SEA algorithm is superior to the Martin algorithm and SCPC algorithm. Since the SEA algorithm does not need filters or auxiliary signals, its complexity is lower than that of the Martin algorithm and SCPC algorithm.

Download Full-text