A simultaneous multiple BeiDou signal acquisition algorithm for a software-based GNSS receiver

Xie, Fei; Liu, Jianye; Li, Rongbing; Feng, Shaojun

doi:10.1016/j.ijleo.2015.11.071

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…The satellite signal is obtained by modulating the C B 2 I code and navigation data with the carrier in the QPSK mode. Unlike the traditional QPSK mode, the B2 signal digital data ( C B 2 I code and navigation data) do not go through a multiplexer but multiply with the carrier of the I (or Q) branch directly (Xie et al, 2016). The modulation process is illustrated in Figure 1.…”

Section: Model Of the B2 Signalmentioning

confidence: 99%

A Fast Acquisition Algorithm Based on Division of GNSS Signals

et al. 2018

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The acquisition of signals is a precondition for tracking and solution calculation in software-based Global Navigation Satellite System (GNSS) receivers. The Parallel Code phase Acquisition (PCA) algorithm can simultaneously obtain the correlation results at every sampling point. However, if the number of sampling points that needs processing is large, this method will lead to a heavy computational load. Thus, we improve the process of the PCA algorithm and propose a novel algorithm that divides the signals intoK(Kis a constant) parts to achieve correlation and obtains the correlation results with a fusion algorithm. This algorithm can simultaneously obtain the correlation results for sampling points at an interval ofKpoints. If theKvalue is selected appropriately, the computational load can be decreased by about 50%. Also, the Receiver Operating Characteristic (ROC) curves show that under a certain probability of false alarm, the detection probability of the proposed algorithms is 5% lower than that of the PCA algorithm. Therefore, the proposed algorithm can speed up the acquisition process with a slight decrease in detection probability.

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Section: Model Of the B2 Signalmentioning

confidence: 99%

A Fast Acquisition Algorithm Based on Division of GNSS Signals

et al. 2018

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“…The satellite signal is obtained by modulating the code and navigation data with the carrier in the QPSK mode. The code and navigation data of the B1 signal are multiplied by the carrier of the channel I (or Q) directly instead of going through a multiplexer (Xie et al, 2016), and the modulation process is illustrated in Figure 3. Different from the modulation method of GPS L1 navigation data, the BeiDou D1 navigation message is modulated with a 1 kbps Neumann-Hoffman (NH) code (Meng et al, 2017).…”

Section: Signal Model Of the B1 Signalmentioning

confidence: 99%

Parallel Frequency Acquisition Algorithm for BeiDou Software Receiver Based on Coherent Downsampling

et al. 2019

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The time it takes to acquire a satellite signal is one of the most important parameters for a Global Navigation Satellite System (GNSS) receiver. The Parallel Frequency space search acquisition Algorithm (PFA) runs faster than the Parallel Code phase search acquisition Algorithm (PCA) when the approximate phase of Pseudo-Random Noise (PRN) code and the approximate value of a Doppler shift are known. However, a large amount of data is needed to be dealt with by the Fast Fourier Transform (FFT) in a traditional PFA algorithm because it processes a narrow-band signal with the initial sampling frequency after the PRN code is stripped. In order to reduce the computational complexity of the traditional PFA algorithm, a down-conversion module and a downsampling module were added to the traditional PFA in the work reported here. Experiments demonstrated that this method not only succeeded in acquiring BeiDou B1I signals, but also the time for acquirement was reduced by at least 80% with the modified PFA algorithm compared with the traditional PFA algorithm. The loss in Signal-to-Noise Ratio (SNR) did not exceed 0·5 dB when the number of coherent points was less than 500.

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“…The Beidou B1 signals are the sum of channel I and Q which are inphase quadrature of each other [4].B1I signal is a public signal, its expression is as follow:…”

Section: Beidou Signal Structurementioning

confidence: 99%

Beidou Signal Acquisition and Tracking Based on HackRF One

2017

Proceedings of 2017 the 7th International Workshop on Computer Science and Engineering

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With the development of software defined radio (SDR) technologies, an increasing number of scientific research institutions and companies have started to use software receiver receiving satellite signals. However, the existing software receiver used the dedicated hardware devices to complete data collection. The existing problem of software receiver collection platform concerns a lack in versatility. This paper uses the Beidou signal as an example, proposing a method that used general software radio equipment to receiver satellite signals and giving an improved method. For Zero-IF signal features to design achieved Zero-IF signal digital track loop structure, used plural cross phase-frequency detector to completed phase identification. Simulation results show that compared the traditional method, the improved method improves detection veracity, more Beidou satellites data can be acquired.

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A simultaneous multiple BeiDou signal acquisition algorithm for a software-based GNSS receiver

Cited by 11 publications

References 13 publications

A Fast Acquisition Algorithm Based on Division of GNSS Signals

A Fast Acquisition Algorithm Based on Division of GNSS Signals

Parallel Frequency Acquisition Algorithm for BeiDou Software Receiver Based on Coherent Downsampling

Beidou Signal Acquisition and Tracking Based on HackRF One

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