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arXiv 2205.09421eess.SP
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双模的Chirp扩频调制

Dual-Mode Chirp Spread Spectrum Modulation

Ali Waqar Azim, Ahmad Bazzi, Raed Shubair, Marwa Chafii

摘要:

在这封信中,我们提出了双模的【形】线性调频扩频(DM-CSS)调制的低功耗广域网。DM-CSS能够实现相对于诸如长距离(LoRa)调制的其对应物更高的频谱效率(SE)。考虑到相同的符号周期,DM-CSS中的SE通过以下方式来增强:(i)同时复用偶线性调频信号和奇线性调频信号;(ii)对于偶线性调频信号和奇线性调频信号两者使用\(0\)和\(π\)弧度的相移;以及(iii)使用上线性调频信号或下线性调频信号。相对于LoRa,对于相同的带宽和扩频因子,SE增加高达\(116.66\%\)。我们提出了一个完整的收发器架构以及非相干检测过程。仿真结果表明,DM-CSS不仅是更有效的频谱,但也比大多数经典的同行更有效的能源。它还表明,DM-CSS是强大的相位和频率偏移。

英文摘要:

In this letter, we propose dual-mode chirp spread spectrum (DM-CSS) modulation for low-power wide-area networks. DM-CSS is capable of achieving a higher spectral efficiency (SE) relative to its counterparts, such as Long Range (LoRa) modulation. Considering the same symbol period, the SE in DM-CSS are augmented by: (i) simultaneously multiplexing even and odd chirp signals; (ii) using phase shifts of \(0\) and \(π\) radians for both even and odd chirp signals; and (iii) using either up-chirp or down-chirp signal. The SE increases by up to \(116.66\%\) for the same bandwidth and spreading factor relative to LoRa. We present a complete transceiver architecture along with non-coherent detection process. Simulation results reveal that DM-CSS is not only more spectral efficient but also more energy efficient than most classical counterparts. It is also demonstrated that DM-CSS is robust to phase and frequency offsets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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