标题： 用于物联网的LoRa MIMO系统实现 显示英文标题

标题： Implementing LoRa MIMO System for Internet of Things

摘要： 带宽限制制约了LoRa的实现。 当代物联网应用需要比LoRa提供的更高的吞吐量。 这项工作引入了一种LoRa多输入多输出（MIMO）系统和空间复用算法来解决LoRa的带宽限制问题。 所提出方法中的收发器在相同的LoRa频段的不同频率上调制信号。 发送端使用频率分割复用（FDM）方法提供更宽的MIMO信道。 与传统的正交频分复用（OFDM）技术不同，这项工作利用了由其专有的啁啾扩频（CSS）调制方式提供的LoRa信号的正交性，在提出的LoRa MIMO系统中执行OFDM。 通过改变LoRa信号的扩频因子（SF）和带宽，可以在同一频率上传输正交信号，而不受FDM的影响。 尽管对于不同的扩频因子和带宽，信道相关性较小，但不同的载波频率确保信号不会重叠，并提供了额外的自由度。 这项工作评估了所提出模型的性能，并进行了广泛的分析，以概述所提出系统的资源消耗情况。 最后，这项工作提供了在测试硬件上对该模型的全面评估的详细结果。 显示英文摘要

摘要： Bandwidth constraints limit LoRa implementations. Contemporary IoT applications require higher throughput than that provided by LoRa. This work introduces a LoRa Multiple Input Multiple Output (MIMO) system and a spatial multiplexing algorithm to address LoRa's bandwidth limitation. The transceivers in the proposed approach modulate the signals on distinct frequencies of the same LoRa band. A Frequency Division Multiplexing (FDM) method is used at the transmitters to provide a wider MIMO channel. Unlike conventional Orthogonal Frequency Division Multiplexing (OFDM) techniques, this work exploits the orthogonality of the LoRa signals facilitated by its proprietary Chirp Spread Spectrum (CSS) modulation to perform an OFDM in the proposed LoRa MIMO system. By varying the Spreading Factor (SF) and bandwidth of LoRa signals, orthogonal signals can transmit on the same frequency irrespective of the FDM. Even though the channel correlation is minimal for different spreading factors and bandwidths, different Carrier Frequencies (CF) ensure the signals do not overlap and provide additional degrees of freedom. This work assesses the proposed model's performance and conducts an extensive analysis to provide an overview of resources consumed by the proposed system. Finally, this work provides the detailed results of a thorough evaluation of the model on test hardware.