본 논문에서는 소출력 무선 통신 기기(SRD : Short Range Device)에 적용 가능한 광대역 하이브리드 직교 폴라 송신(Wideband Hybrid Quadrature Polar transmitter) 구조를 제시하였다. 먼저 시스템 성능 분석을 위한 시뮬레이션 환경을 구축한 후 송신기 성능 파라미터들에 의한 성능 열화 분석을 실시하였다. 주요 성능 열화 요인으로 VVA(Voltage Variable Attenuator)의 슬루율(Slewrate), 크기 및 위상 신호의 시간 지연 그리고 DAC(Digital-to-Analog Converter) 비트수를 고려하였으며, 성능 열화 분석 시뮬레이션을 통해서 송신기 요구 규격을 만족하는 최소 요구 파라미터 값을 확인하였다. 또한 성능 분석 결과를 바탕으로 광대역 하이브리드 직교 폴라 송신기 플랫폼을 구현하였고 3GPP 표준 규격을 참조하여 송신기 성능 측정 및 분석을 실시하였으며 그 결과를 확인하였다.
KSP Keywords
Polar transmitter, digital-to-analog(DAC), digital-to-analog converters, range device, short-range, voltage variable attenuator(VVA)
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