Abstract
Many modern ionospheric studies rely on incoherent scatter radars (ISR) since this kind of radar is able to detect various ionospheric parameters over very long ranges. The performance of ISR significantly depends on its coding system. In recent decades, a new type of coding system, which is the so-called composite coding, was presented. It used to be constructed by using a certain code to modulate alternating code to achieve better detection resolution and anti-noise performance for ISRs. In the present study, a new composite coding system was presented, which is constructed based on complementary codes and alternating codes. In this paper, the performance of the new composite code will be compared with that of several traditional codes to show that the new composite code can help to improve the detection performance of the ISR. According to the analysis based on the ambiguity function, the present composite coding system helps to improve the range resolution and detection range for ISR detections. In addition, numerical tests on anti-noise performance show that the complementary composite coding system has a good anti-noise performance and helps to reduce the necessary times of incoherent integration. As a result, the composite coding system can improve the time resolution.
Highlights
The complementary code, which is called the Golay code, was first proposed by Golay in 1949 [16]
The three figures illustrate that the detection range and the range resolution could increase with the bits of the composite code
A new composite coding system, which is constructed by a complementary code modulation alternating code, was proposed for incoherent scattering radar
Summary
Citation: Chen, H.; Yuan, K.; Yao, M.; Xiong, J. A Novel Composite Coding Method for Incoherent Scatter Radar. Atmosphere 2021, 12, 1518. https://doi.org/10.3390/ atmos12111518 Received: 26 October 2021 Accepted: 15 November 2021 Published: 18 November 2021 Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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