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The Journal of The Korea Institute of Intelligent Transport Systems Vol.5 No.2 pp.19-28
UR-WPAN 시스템에서 PPM+BPSK 변조 방식을 사용하는 UWB 송수신기의 성능 분석
Performance analysis of UWB receiver using PPM and BPSK modulation scheme in the LR-WPAN System
Abstract
In the IEEE 802.15.4a system, they require simple, economical and low power consumption transmitter and receiver to transmit low rate data and to identify distance and location. To meet these requirements, LR-WPAN system use transmitter and receiver with simple modulation and demodulation scheme. In this paper, use PPM+BPSK modulation and windowing scheme to overcome multipath fading effect. Then we apply this channel estimation scheme to LR-WPAN system and compare performance depends on transmitter scheme. Proposed method using preamble to find channel characteristic out and we compensate distorted data with that information. Therefore we can detect signal easily at the demodulation part. Simulation result shows that performance evaluation is greater at the NLOS channel than LOS channel no matter what the receiver scheme.
