在以往所建構的么正空時調變，都是使用PSK訊號來建構且碼率較低，在本文中所建構的么正空時調變，使用的是非固定能量訊號來建構且碼率較高，我們在嚮導符元協助調變的架構下建構么正空時調變。我們總共建構了3種么正空時調變，第1種和第2種建構式么正空時調變碼率與8PSK的訓練碼相同，第3種建構式么正空時調變碼率與16PSK的訓練碼相同，我們所建構出來的么正空時調變比起使用PSK訊號架構出來的訓練碼有較佳的最小距離以及框架錯誤機率。

In all schemes of unitary space-time modulation (USTM), PSK is used and the data rate is low. In this thesis, we construct USTM with high rate using nonconstant-energy signals. Our schemes are based on pilot symbol-assisted modulation (PSAM). We construct three types of USTM. The data rate of Construction I and Construction II is the same as the training code using 8PSK. The data rate of Construction III is the same as the training code using 16PSK. Codes constructed by our schemes have better minimum distance and frame error performance than codes in the previous schemes.

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