Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Implementation of 868/915 MHz LR-WPAN Transceiver for IoT Systems

IoT 시스템을 위한 868/915 MHz LR-WPAN 송수신기의 구현

  • Lee, Jong-Bae (School of Electronic Engineering, Soongsil University) ;
  • Lee, Seongsoo (School of Electronic Engineering, Soongsil University)
  • Received : 2016.03.16
  • Accepted : 2016.03.21
  • Published : 2016.03.31
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Abstract

In this paper, an IEEE 802.15.4 LR-WPAN 868/915 MHz ZigBee transceiver for IoT systems was designed and implemented. Non-coherent demodulation was exploited to satisfy ${\pm}80ppm$ frequency offset recommended in IEEE 802.15.4 LR-WPAN. Variable bitrate was supported according to operation modes. SPI module was embedded to connect various MCUs. The designed Zigbee transceiver was described in Verilog HDL and it was synthesized and verified in $0.18{\mu}m$ process. Its gate count was about 32,000 gates.

본 논문에서는 IoT 시스템을 위한 IEEE 802.15.4 LR-WPAN 868/915 MHz 대역 ZigBee 송수신기를 설계하고 구현하였다. IEEE 802.15.4 LR-WPAN에서 권고하는 ${\pm}80ppm$의 주파수 오프셋에서도 동작이 가능한 비간섭성 방식의 복조 알고리즘을 적용하였으며, 모드에 따라 가변 데이터 전송률을 지원하도록 구현하였다. 또한 SPI 통신 모듈을 탑재하여 다양한 MCU에 연결하여 사용이 가능하다. 설계된 ZigBee 송수신기는 Verilog HDL로 기술하고 $0.18{\mu}m$ 공정에서 합성 및 검증하였으며 게이트 수는 약 32,000 게이트였다.

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References

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  1. Enhanced Segmentized Clear Channel Assessment Method for IEEE 802.15.4 Network vol.20, pp.3, 2016, https://doi.org/10.7471/ikeee.2016.20.3.322