• Proceedings of the KIEE Conference
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• 2005.07d
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• pp.2992-2994
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• 2005

수십 센티미터 이내의 오차를 만족시키는 거리/위치판별 기능 및 저속 데이터 송수신 기능 구현을 주목적으로 발족된 저속 무선 개인영역 네트워크(LR-WPAN: Low Rate Wireless Personal Area Network)의 표준인 IEEE802.15.4a는 간단하고 경제적이며 전력 소모가 적은 송수신기 구조를 요구한다. 이에 본 논문에서는 PEWB(Parallel Energy Window Banks)를 이용한 독창적인 비동기(noncoherent) OOK(On-Off Keying) UWB(Ultra-Wide Band) 송수신기 구조를 제안한다. 또한 무선 다중경로 채널상황을 다소 극복할 수 있는 펄스와 비트 반복 기법을 사용한다. 제안된 송수신기의 잡음 특성 분석을 위해 chi-square 분포가 사용되며, 반복적 계산을 통해 얻어진 임계값을 적용하여 BER(Bit Error Rate) 성능을 분석한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.11A
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• pp.1027-1034
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• 2005

IEEE802.15.4a, which is started to realize the PHY layer including high precision ranging/positioning and low data rate communication functions, requires a simple and low power consumable transceiver architecture. To satisfy this requirements, the simple noncoherent on-off keying (OOK) UWB transceiver with the parallel energy window banks (PEWB) giving high precision signal processing interface is proposed. The flexibility of the proposed system in multipath fading channel environments is acquired with the pulse and bit repetition method. To analyze the bit error rate (BER) performance of this proposed system, a noise model in receiver is derived with commonly used random variable distribution, chi-square. BER of $10^{-5}$ under the line-of-sight (LOS) residential channel is achieved with the integration time of 32 ns and signal to noise ratio (SNR) of 15.3 dB. For the non-line-of-sight (NLOS) outdoor channel, the integration time of 72 ns and SNR of 16.2 dB are needed. The integrated energy to total received energy (IRR) for the best BER performance is about $86\%$.