Abstract
In order to overcome the problems of the traditional algorithm, such as the time‐consuming execution of acquisition instructions, low signal tracking accuracy, and low signal capture accuracy, a global satellite positioning receiver acquisition and tracking algorithm based on UWB technology is designed in this study. On the basis of expounding the pulse generation method and working principle in UWB technology, this paper analyzes in detail the characteristics of UWB technology, such as antimultipath, low power consumption, and strong penetration. Then, on the basis of window function filtering, in the process of three‐dimensional search of global satellite positioning signal, firstly, the satellite signal entering the GPS software receiver is processed by RF front‐end mixing and AD sampling, and then, the signal tracking and navigation message solving are completed according to the relationship between the influence factor and Doppler frequency offset. The experimental results show that the execution time of the acquisition instruction of the proposed algorithm varies between 1129 ms and 1617 ms; the signal tracking accuracy ranges between 0.931 and 0.951, and the signal capture accuracy ranges between 93.3% and 95.6%, which proves that the proposed algorithm has achieved the design expectation.
Highlights
Global positioning system (GPS) has realized real-time, reliable, and accurate positioning services anywhere on the earth, and GPS receiver is the key to realize accurate and fast positioning [1]
On the basis of window function filtering, in the process of three-dimensional search of global satellite positioning signal, firstly, the satellite signal entering the GPS software receiver is processed by RF front-end mixing and AD sampling, and the signal tracking and navigation message solving are completed according to the relationship between the influence factor and Doppler frequency offset
The acquisition and tracking algorithm for global satellite positioning receiver based on Ultrawide band (UWB) technology designed in this study has the advantages of less time consuming in the execution of capture instructions, high signal tracking accuracy, and high signal capture accuracy and is suitable for promotion
Summary
Global positioning system (GPS) has realized real-time, reliable, and accurate positioning services anywhere on the earth, and GPS receiver is the key to realize accurate and fast positioning [1]. To improve the capture speed, in reference [5], a new parallel fast acquisition algorithm is proposed for C/A code acquisition of GPS software receiver under weak signal conditions. In this method, the average correlation technique is used to reduce the autocorrelation loss of C/A codes, and the cumulative error of C/A codes is reduced based on the carrier frequency error compensation technique. On the basis of window function filtering, in the process of three-dimensional search of global satellite positioning signal, firstly, the satellite signal entering the GPS software receiver is processed by RF front-end mixing and AD sampling, and the signal tracking and navigation message solving are completed according to the relationship between the influence factor and Doppler frequency offset.
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