Simulation study of a bandwidth efficient modulation with fast roll-off sidelobes

[[abstract]]數位平滑頻率調變在IEEE 802.16.1領域裡被廣泛的討論，因為數位平滑頻率調變具有低成本的硬體耗費，而且在衛星通訊的上傳鏈結（uplink），也是具有低成本的耗費。但是他的接收機部份因為訊號有記憶性，所以在解調的部份會比較複雜。 因此，本論文依據楊新雄教授建構之數位相位調變系統[1]，提出一種可以改善數位平滑頻率調變的數位相位調變方式，稱之為數位平滑相位調變，並進行系統模擬。本論文針對數位平滑相位調變進行模擬後，發現新的調變方式符合：1.相位具有連續性(傳輸訊號連續)。2.其頻譜優於最小頻率平移鍵。3.最小歐式距離比最小頻率平移鍵及數位平滑頻率調變都要來的好。[[abstract]]Digital tamed frequency modulation is discussed extensively in IEEE 802.16.1,because digital tamed frequency modulation has low-cost hardware that are consumed. And digital tamed frequency modulation in the uplink also makes low-cost. But its receiver component has memory in the signal, so its will be more complicated in the component of demodulation. This thesis adjusts the modulation system according to what the Hsin-Hsyong Yang professor built and constructed. Propose a digital phase modulation way that can improve digital tamed frequency modulation, we call it digital tamed phase modulation and simulate it. When the thesis simulate digital tamed phase modulation, find the new modulation way accords with：1. The phase has continuity（Transmit the signal continuously）. 2. The power spectrum density is better than minimum frequency shift keying. 3. The minimum Euclidean distance is better than minimum frequency shift keying and digital tamed frequency modulation