本文中,以軟體定義無線電架構為基礎,設計與實做接收機的射頻前端模組並使用軟體完成收發機調變與解調變技術。 其中射頻前端模組包含雜訊放大器、頻率合成器與解調器。調變技術則包含OFDM。符碼/頻率同步、通道估測/等化。最後以分析系統的性能來做評估。 ;This thesis presents the design and implements an RF receiver analog frontend and a communication system contains modulation and demodulation by a Software-Define-Radio (SDR) platform. The RF receiver analog frontend includes low noise amplifier, frequency synthesizer and demodulator. The modulation includes the OFDM modulation scheme, Symbol/Carrier Synchronization and channel estimation/equalization. Finally testing the system to evaluate the system performance.