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LoRa signal transmission method based on MIMO

A signal transmission and signal technology, which is applied in the field of MIMO-based LoRa signal transmission, can solve the problems of reduced reliability and high bit error rate, and achieve the effects of improving reliability, increasing diversity, and resisting Rayleigh fading

Active Publication Date: 2018-02-09
SHENZHEN UNIV
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Problems solved by technology

[0003] The existing LoRa technology is an emerging technology, which uses CSS spread spectrum modulation and adaptive data rate, but the LoRa signal uses a single antenna to transmit the signal, after the signal enters the Rayleigh channel, its error The bit rate is high, and the reliability of transmission is greatly reduced

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  • LoRa signal transmission method based on MIMO
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  • LoRa signal transmission method based on MIMO

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Embodiment Construction

[0027] In order to make those skilled in the art more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Space-Time Block Coding (STBC) is a coding method in Space-Time Coding (Space-Time Coding) technology, and Space-Time Coding technology is a revolution in exploiting multiple-input multiple-output system (MIMO) performance by using array antenna processing technology It can effectively counteract fading and improve spectral efficiency, that is, the effective work of space-time coding technology requires the use of multiple antennas at the transmitting and receiving ends, because space-time coding uses two-dimensional directions of time domain and space domain to process signals Coding, so that it can effectively resist fading and improve power efficiency; and can realize parallel multiplex transmission in the ...

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Abstract

The invention discloses a LoRa signal transmission method based on MIMO, and the method comprises the steps: carrying out the modulation of a to-be-transmitted LoRa signal x, so as to obtain a modulated signal; carrying out the space-time group coding of the modulated signal; adding noise to the coded signal, and transmitting the signal with noise on a Rayleigh channel; enabling a receiving end todecode the received signal, and carrying out the demodulation of the decoded signal so as to obtain a received signal x'. Compared with the prior art, the method can effectively resist the Rayleigh fading in a novel transmission mode of LoRa+MIMO, and improves the transmission reliability of the LoRa signal in the Rayleigh channel. In other words, the multi-antenna technology is added to the LoRatechnology, and the method employs the mode of space-time group coding for signal transmission, and can increase the capacity of the channel, so as to improve the diversity order of the signal transmitting and receiving ends, obtaining the diversity gain so as to resist the Rayleigh fading, and improving the transmission reliability of the LoRa signal in the Rayleigh channel.

Description

technical field [0001] The present invention relates to the communication field, and more particularly relates to a LoRa signal transmission method based on MIMO. Background technique [0002] Today, the Internet of Things has entered our daily life, and the dream of the Internet of Everything is getting closer and closer to us. Among them, the introduction of low-power wide-area technology has brought the Internet of Things to a higher level. In the low-power wide-area technology, because LoRa technology has the advantages of low power consumption, long-distance, scalability, and low cost, and it has excellent physical layer modulation schemes and the characteristics of adaptive control of data rates, so that LoRa Technology becomes one of the most favored technologies. [0003] The existing LoRa technology is an emerging technology, which uses CSS spread spectrum modulation and adaptive data rate, but the LoRa signal uses a single antenna to transmit the signal, after the...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04L1/06
CPCH04B7/0413H04L1/0643
Inventor 张沛昌黄磊孙维泽何春龙李强黄敏王一波杨丽鲜
Owner SHENZHEN UNIV
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