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Sensors 2017, 17(5), 1039; doi:10.3390/s17051039

Radio Frequency Compatibility Evaluation of S Band Navigation Signals for Future BeiDou

1
College of Information & Communication Engineering, Harbin Engineering University, Harbin 150001, China
2
State Key Laboratory of Space-Ground Integrated Information Technology, Beijing 100086, China
*
Authors to whom correspondence should be addressed.
Received: 13 March 2017 / Revised: 18 April 2017 / Accepted: 2 May 2017 / Published: 5 May 2017
(This article belongs to the Section Remote Sensors)

Abstract

With L band frequency allocations for satellite navigation getting more crowded, S band (2483.5–2500 MHz) is already allocated for navigation services, where Globalstar broadcasts downlink communications to user terminals. The Indian Regional Navigation Satellite System (IRNSS) is transmitting navigation signals and Galileo exploits some potential signals in S band. Also, several candidate S band signals based on binary offset carrier (BOC), binary phase shift keying (BPSK), continuous phase modulation (CPM) and minimum shift keying-BOC (MSK-BOC) are suggested for BeiDou system (BDS). In quite narrow S band, mutual interference among these systems is inevitable, thus the compatibility issue is particularly significant for S band signal design. To explore desired S band signals for BDS, the paper firstly describes a comprehensive compatibility evaluation methods based on effective carrier-to-noise ratio degradation for acquisition and code tracking. Then a real simulation is established using space constellations, modulation schemes and received power. Finally, the worst mutual interference of BDS candidate signals with Galileo, IRNSS and Globalstar is calculated and compared. The results indicate that CPM signal is easier to allow peaceful coexistence of other systems with minimal mutual interference in S band compared to other BDS candidates. View Full-Text
Keywords: S band; satellite navigation; BeiDou; radio frequency compatibility S band; satellite navigation; BeiDou; radio frequency compatibility
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sun, Y.; Xue, R.; Zhao, D.; Wang, D. Radio Frequency Compatibility Evaluation of S Band Navigation Signals for Future BeiDou. Sensors 2017, 17, 1039.

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