航空通信中L-DACS1的高效数据辅助同步

T. Pham, A. P. Vinod, A. Madhukumar
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引用次数: 5

摘要

l波段1型数字航空通信系统(L-DACS1)是一种新兴的标准,旨在通过将传统的模拟航空通信系统过渡到优越、高效的数字领域来加强空中交通管理(ATM)。L-DACS1采用现代高效的正交频分复用(OFDM)调制技术,实现比现有航空通信系统更高效、更高的数据速率。然而,OFDM系统的性能对同步误差非常敏感。L-DACS1传输在l波段航空信道,该信道受到较大的干扰和多普勒频移,这使得L-DACS1的同步更具挑战性。本文提出了一种计算效率高、性能稳定的L-DACS1系统同步方法。仿真结果表明,该方法能够在一定范围的航空信道范围内提供精确的符号时序偏移(STO)估计和分数载波频率偏移(CFO)估计。特别是在载波频偏较大的情况下,能产生优异的同步性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An Efficient Data-aided Synchronization in L-DACS1 for Aeronautical Communications
L-band Digital Aeronautical Communication System type-1 (L-DACS1) is an emerging standard that aims at enhancing air traffic management (ATM) by transitioning the traditional analog aeronautical communication systems to the superior and highly efficient digital domain. L-DACS1 employs modern and efficient orthogonal frequency division multiplexing (OFDM) modulation technique to achieve more efficient and higher data rate in comparison to the existing aeronautical communication systems. However, the performance of OFDM systems is very sensitive to synchronization errors. L-DACS1 transmission is in the L-band aeronautical channels that suffer from large interference and large Doppler shifts, which makes the synchronization for L-DACS more challenging. This paper proposes a novel computationally efficient synchronization method for L-DACS1 systems that offers robust performance. Through simulation, the proposed method is shown to provide accurate symbol timing offset (STO) estimation as well as fractional carrier frequency offset (CFO) estimation in a range of aeronautical channels. In particular, it can yield excellent synchronization performance in the face of a large carrier frequency offset.
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