Efficient Joint Parameter Estimation and Soft Noncoherent Detection Scheme for LoRa-based IoT System

Zhongyang Yu, Zhengying Wen,Jixun Gao, Yuqian Yan,Chunhua Zhu

2023 28TH ASIA PACIFIC CONFERENCE ON COMMUNICATIONS, APCC 2023（2023）

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摘要

Considering limited pilot overhead and large delay and Doppler shift in LoRa (Long Range)-based IoT (Internet of Things) systems, this paper presents an efficient joint parameter estimation and soft nonconherent detection scheme. During the parameter estimation, a joint delay and Doppler shift estimation method is proposed, which is called the JDDSE method. Different from the existing estimation methods, the proposed method utilizes the time-domain characteristic of the LoRa signal and only needs to estimate a joint offset of the delay and Doppler shift instead of their respective offsets. Then, a soft noncoherent detection is developed from the existing work in order to match the JDDSE method. Simulation results indicate the validity of the proposed method under the uplink IoT transmission.

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关键词

Parameter Estimates,Internet Of Things,Estimation Strategy,Internet Of Things Systems,Joint Estimation Of Parameters,Non-coherent Detection,Simulation Results,Estimation Method,Large Shift,Doppler Shift,Large Delay,Delay Estimation,Root Mean Square Error,Additive Noise,Performance Loss,Estimation Process,Bit Error Rate,Discrete Fourier Transform,Perfect Performance,Bit Error Rate Performance,Decimal Value,Symbol Duration,Pilot Symbols,Binary Digits,Pilot Signals,Small Overhead,Spread Spectrum,Future Transmission

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