This paper presents a novel transceiver design aimed at enabling Direct-to-Satellite Internet of Things (DtS-IoT) systems based on long range-frequency hopping spread spectrum (LR-FHSS). Our focus lies in developing an accurate transmission method through the analysis of the frame structure and key parameters outlined in Long Range Wide-Area Network (LoRaWAN) [1]. To address the Doppler effect in DtS-IoT networks and simultaneously receive numerous frequency hopping signals, a robust signal detector for the receiver is proposed. We verify the performance of the proposed LR-FHSS transceiver design through simulations conducted in a realistic satellite channel environment, assessing metrics such as miss detection probability and packet error probability.

翻译：本文提出一种新型收发器设计，旨在实现基于长距离跳频扩频（LR-FHSS）的直连卫星物联网（DtS-IoT）系统。我们的研究重点在于通过分析远程广域网络（LoRaWAN）[1]中定义的帧结构与关键参数，开发精确的传输方法。为应对DtS-IoT网络中的多普勒效应并同时接收大量跳频信号，提出一种适用于接收端的鲁棒信号检测器。通过在真实卫星信道环境下开展仿真实验，从漏检概率与误包概率等指标验证所提LR-FHSS收发器设计的性能。