Design of Universal Code Generator for Multi-Constellation Multi-Frequency GNSS Receiver
A multi-constellation, multi-frequency Global Navigation Satellite System (GNSS) receiver is capable of simultaneously receiving signals from multiple satellite constellations across various frequency bands. This allows for increased observations, thereby enhancing navigation accuracy, continuity, e...
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| Veröffentlicht in: | Electronics (Basel) 2024-04, Vol.13 (7), p.1244 |
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| creator | Ba, Xiaohui Liu, Taibin Jiang, Wei Wang, Jian Cai, Baigen Chai, Linguo Liang, Kun |
| description | A multi-constellation, multi-frequency Global Navigation Satellite System (GNSS) receiver is capable of simultaneously receiving signals from multiple satellite constellations across various frequency bands. This allows for increased observations, thereby enhancing navigation accuracy, continuity, effectiveness, and reliability. The spread spectrum code structures used in satellite navigation signals differ among systems. Compatible code generators are employed in multi-constellation, multi-frequency GNSS receivers to support tasks such as signal acquisition and tracking. There are three main types of spread spectrum code structures: Linear Feedback Shift Register (LFSR), Legendre sequences, and Memory codes. The Indian Regional Navigation Satellite System (IRNSS) released the L1-SPS (Standard Positioning Service) signal format in August 2023, which utilizes the Interleaved Z4-linear ranging code (IZ4 code) as its spread spectrum code. Currently, there is no universal code generator design compatible with the IZ4 code. In this paper, a proposed universal code generator is based on the hardware structure of the IRNSS IZ4 code generator. It achieves compatibility with all LFSR-based spread spectrum codes and enables parallel generation of multiple sets of GNSS signal spread spectrum codes, thereby improving hardware utilization efficiency. The proposed structure is implemented and validated using FPGA design, and resource consumption is provided as part of the validation results. |
| doi_str_mv | 10.3390/electronics13071244 |
| format | Article |
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This allows for increased observations, thereby enhancing navigation accuracy, continuity, effectiveness, and reliability. The spread spectrum code structures used in satellite navigation signals differ among systems. Compatible code generators are employed in multi-constellation, multi-frequency GNSS receivers to support tasks such as signal acquisition and tracking. There are three main types of spread spectrum code structures: Linear Feedback Shift Register (LFSR), Legendre sequences, and Memory codes. The Indian Regional Navigation Satellite System (IRNSS) released the L1-SPS (Standard Positioning Service) signal format in August 2023, which utilizes the Interleaved Z4-linear ranging code (IZ4 code) as its spread spectrum code. Currently, there is no universal code generator design compatible with the IZ4 code. In this paper, a proposed universal code generator is based on the hardware structure of the IRNSS IZ4 code generator. It achieves compatibility with all LFSR-based spread spectrum codes and enables parallel generation of multiple sets of GNSS signal spread spectrum codes, thereby improving hardware utilization efficiency. The proposed structure is implemented and validated using FPGA design, and resource consumption is provided as part of the validation results.</description><identifier>ISSN: 2079-9292</identifier><identifier>EISSN: 2079-9292</identifier><identifier>DOI: 10.3390/electronics13071244</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Artificial satellites ; Circuit design ; Codes ; Communications equipment ; Compatibility ; Electronics in navigation ; Frequencies ; Global navigation satellite system ; Hardware ; Indian spacecraft ; Linear feedback shift registers ; Navigation systems ; Satellite constellations ; Satellites ; Sequences ; Spread spectrum ; Spread spectrum transmission ; Telematics</subject><ispartof>Electronics (Basel), 2024-04, Vol.13 (7), p.1244</ispartof><rights>COPYRIGHT 2024 MDPI AG</rights><rights>2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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| source | MDPI - Multidisciplinary Digital Publishing Institute; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Artificial satellites Circuit design Codes Communications equipment Compatibility Electronics in navigation Frequencies Global navigation satellite system Hardware Indian spacecraft Linear feedback shift registers Navigation systems Satellite constellations Satellites Sequences Spread spectrum Spread spectrum transmission Telematics |
| title | Design of Universal Code Generator for Multi-Constellation Multi-Frequency GNSS Receiver |
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