近年來，在頻率非選擇性衰退通道下透過多個傳送與接收天線來通訊的研究受到了很大的注意。另一方面，籬笆編碼連續相位調變在頻寬和功率有限的通訊系統應用中也受到很大的關注。這是因為它可以免除非線性通道效應而且在功率、頻寬和複雜度之間有著很好的取捨。連續相位頻移鍵調變是一種簡單的連續相位調變機制，並且在數位移動無線電傳輸中非常有用。在這篇論文裡面，我們首先對於連續相位頻移鍵調變發展了一個在頻率非選擇性快速衰退通道下新奇的時間空間編碼設計準則，並且提出了一個簡單的編碼機制。這個編碼機制包含了一個最佳化的環迴旋碼和一個空間編碼器。我們的推導是基於Rimoldi 對於連續相位調變信號的分解方法。Rimoldi 的方法把連續相位調變器分解成一個線性時間不變性的連續相位編碼器，串接著一個時間不變性的非記憶性的調變器。這種方法啟發我們來建構一個基於環的連續相位頻移鍵調變的時間空間碼編碼器。從我們的推導可以得到這個編碼設計準則和一個由連續相位頻移鍵調變器的輸入符元構成的特別矩陣有關。我們提出的簡易的交錯式時間空間編碼架構包含了由迴旋交錯器連結起來的環迴旋編碼器和空間編碼器，能夠利用可能的時間與空間分集增益。我們探討了從空間調變柵狀圖來產生符元度量給迴旋碼的Viterbi 解碼器的解碼演算法。透過模擬結果，我們可以證實這種透過交錯式連結的迴旋碼（針對時間分集增益）與空間編碼（針對空間分集增益）組合，在多種的系統參數下都深具優勢。

In this thesis, we derive a novel space-time code design
criterion for continuous phase frequency shift keying (CPFSK) over frequency-nonselective fading channels.
Our derivation is based on a specific matrix that is related to the input symbols of the CPFSK modulators.
With this code design criterion, we propose a simple interleaved space-time encoding scheme for CPFSK modulation over frequency-nonselective correlated fading channels to exploit potential temporal and spatial diversity
advantages. Such an encoding scheme consists of a ring convolutional encoder and a spatial encoder between which a convolutional interleaver is placed. A decoding algorithm that generates symbol metrics for the Viterbi decoder
of convolutional codes from the spatial modulation trellis is examined. Simulation results confirm that the advantages of combination of the interleaved convolutional encoding (for temporal diversity) and the spatial encoding (for spatial diversity) are promising for various system parameters.

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