一個新的用於非同調偵測的區塊編碼調變架構，稱作非同調區塊編碼MPSK (noncoherent block-coded MPSK)，最近被提出。此外，對於未編碼正交振幅調變 (quadrature amplitude modulation)，在2002以及2005年所提出能量控制的方式，在相同且高碼率下正交振幅調變會比MPSK有較佳的錯誤效能。 在本篇論文中，我們提出利用非同調區塊編碼MPSK去建構成非同調區塊編碼正交振幅調變(noncoherent block-coded QAM)，並且利用分析以及模擬來找出最適當的內、外圈半徑比例。非同調區塊編碼正交振幅調變較非同調區塊編碼MPSK具有大的最小非同調距離以及較佳的錯誤效能。我們也証明在2005年所提出的能量控制方法可以視為非同調區塊編碼正交振幅調變的一個特例。但在我們所提出的非同調區塊編碼正交振幅調變架構，可以對它做適當的編碼，以得到更大的最小非同調距離。 A novel block coded modulation scheme for noncoherent detection, called noncoherent block-coded MPSK (NBC-MPSK) was proposed recently. Besides, uncoded quadrature amplitude modulation (QAM) with energy constraint methods have been proposed in 2002 and 2005, which have better error performance than uncoded MPSK with the same high data rate. In this thesis, we extend NBC-MPSK to noncoherent block-coded QAM (NBC-QAM). We find out the appropriate ratio of inner and outer radius by the analysis and simulations. Compared with NBC-MPSK, NBC-QAM has larger minimum noncoherent distance and therefore better error performance. We also show that QAM with the energy constraint method proposed in 2005 can be viewed as a special case of NBC-QAM. But in our NBC-QAM scheme, minimum noncoherent distance of QAM can be further enlarged by using more redundant bits.
