臺灣大學: 電信工程學研究所鐘嘉德林展弘Lin, Chang-HongChang-HongLin2013-03-272018-07-052013-03-272018-07-052010http://ntur.lib.ntu.edu.tw//handle/246246/253189正交分頻分工(OFDM)系統在數位通信中被譽為最有效率的調變方法。OFDM系統在抗多路徑衰減通道中的優異能力使得它在數位通信世界中屹立不搖幾十年。然而，由於它的高峰值對均值功率比使得放大器無法工作在線性區間，因而導致系統的表現低下。另一方面，連續相位調變(CPM)信號擁有完美的峰值對均值功率比，且由於它的連續相位造成它在頻譜上有些優異的表現。我們知道任何任何相位調變信號可以被分解成一堆脈波振福調變信號的疊加。藉由這樣的方法，相位調變信號就被轉化成振幅調變信號了。如此一來簡化了他的接收端設計同時不會犧牲掉它的好性質。在這篇論文中，我們將引進一種新的信號稱為多頻率連續相位頻率鍵移系統的新信號模型。此種信號將繼承一些多載波調變信號及連續相位調變信號的優點。稍後我們將詳細討論它的接收端設計及各方面表現。OFDM (Orthogonal Frequency Division Multiplex) techniques are touted as the most efficient method in digital communications. An excellent performance in error probability of fading channels and spectrum efficiency has sustained OFDM systems’ status for decades. However, due to its high PAPR (Peak –to- Average Power Ratio), amplifiers may work in the nonlinear region which results in performance degradation. On the other hand, CPM (Continuous Phase Modulation) signals have a superb advantage in PAPR. Moreover, some good spectral characteristic features are eminent as a consequence of its phase continuity. It is also known that any binary CPM-based signal can be decomposed into summation of several PAM (Pulse Amplitude Modulation) waves. By doing this, phase modulation is transformed into linear modulation, which simplifies its receiver design while not sacrificing its good properties. In this thesis, we will introduce a signaling model called multi-frequency CPFSK signaling which inherits most of the merits of multicarrier systems (such as OFDM systems) and CPM systems. We will discuss its receiver design and performance in detail later in this thesis.1374460 bytesapplication/pdfen-US多頻率連續相位調變CPFSK Multi-frequency Systemthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/253189/1/ntu-98-R96942026-1.pdf