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고속 초협대역 디지털 무전기를 위한 전송 구조 설계 및 성능 분석
안홍선(Hongsun An),이유성(Yusung Lee),송봉섭(Bongseop Song) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
In this paper, a frame structure and a parallel synchronizer schemes are proposed for a narrow band digital radio with 28,800 bps data rate. The frame structure is designed to facilitate higher data rate transmission. A preamble and periodic pilots are inserted to frame structure for reliable data detection. The system can be obtain improved time and frequency synchronization performance through the proposed synchronizer, which is based on parallel correlator. The simulation results prove that the proposed parallel synchronizer performs effectively without performance degradation until 120 Hz frequency offset. It is shown that the performance of the digital radio achieves about 1 dB difference at target BLER of 10<SUP>-2</SUP> under 120 Hz frequency offset compared to zero offset.